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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
Tailscale
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../openconnect/" class="md-nav__link">
<span class="md-ellipsis">
OpenConnect Client
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../openvpn-client/" class="md-nav__link">
<span class="md-ellipsis">
OpenVPN Client
</span>
</a>
</li>
<li class="md-nav__item md-nav__item--active">
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
<label class="md-nav__link md-nav__link--active" for="__toc">
<span class="md-ellipsis">
OpenVPN Server
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<a href="./" class="md-nav__link md-nav__link--active">
<span class="md-ellipsis">
OpenVPN Server
</span>
</a>
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#structure" class="md-nav__link">
<span class="md-ellipsis">
Structure
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#listen-fields" class="md-nav__link">
<span class="md-ellipsis">
Listen Fields
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#fields" class="md-nav__link">
<span class="md-ellipsis">
Fields
</span>
</a>
<nav class="md-nav" aria-label="Fields">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#system" class="md-nav__link">
<span class="md-ellipsis">
system
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#name" class="md-nav__link">
<span class="md-ellipsis">
name
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mtu" class="md-nav__link">
<span class="md-ellipsis">
mtu
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mode" class="md-nav__link">
<span class="md-ellipsis">
mode
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#network" class="md-nav__link">
<span class="md-ellipsis">
network
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#remote" class="md-nav__link">
<span class="md-ellipsis">
remote
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#remote_port" class="md-nav__link">
<span class="md-ellipsis">
remote_port
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#max_clients" class="md-nav__link">
<span class="md-ellipsis">
max_clients
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#address" class="md-nav__link">
<span class="md-ellipsis">
address
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#peer_address" class="md-nav__link">
<span class="md-ellipsis">
peer_address
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#peer_address_ipv6" class="md-nav__link">
<span class="md-ellipsis">
peer_address_ipv6
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#topology" class="md-nav__link">
<span class="md-ellipsis">
topology
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#duplicate_cn" class="md-nav__link">
<span class="md-ellipsis">
duplicate_cn
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#users" class="md-nav__link">
<span class="md-ellipsis">
users
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#usersusername" class="md-nav__link">
<span class="md-ellipsis">
users.username
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#userspassword" class="md-nav__link">
<span class="md-ellipsis">
users.password
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#static_key" class="md-nav__link">
<span class="md-ellipsis">
static_key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#static_key_path" class="md-nav__link">
<span class="md-ellipsis">
static_key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#key_direction" class="md-nav__link">
<span class="md-ellipsis">
key_direction
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tls" class="md-nav__link">
<span class="md-ellipsis">
tls
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate_path" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlskey" class="md-nav__link">
<span class="md-ellipsis">
tls.key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlskey_path" class="md-nav__link">
<span class="md-ellipsis">
tls.key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_certificate" class="md-nav__link">
<span class="md-ellipsis">
tls.client_certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_certificate_path" class="md-nav__link">
<span class="md-ellipsis">
tls.client_certificate_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsverify_client_certificate" class="md-nav__link">
<span class="md-ellipsis">
tls.verify_client_certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_name" class="md-nav__link">
<span class="md-ellipsis">
tls.client_name
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_name_type" class="md-nav__link">
<span class="md-ellipsis">
tls.client_name_type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlspeer_fingerprint" class="md-nav__link">
<span class="md-ellipsis">
tls.peer_fingerprint
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscrl_path" class="md-nav__link">
<span class="md-ellipsis">
tls.crl_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_ku" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_ku
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_eku" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_eku
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_tls" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_tls
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate_profile" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate_profile
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsns_certificate_type" class="md-nav__link">
<span class="md-ellipsis">
tls.ns_certificate_type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsversion_min" class="md-nav__link">
<span class="md-ellipsis">
tls.version_min
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsversion_max" class="md-nav__link">
<span class="md-ellipsis">
tls.version_max
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscipher" class="md-nav__link">
<span class="md-ellipsis">
tls.cipher
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsgroups" class="md-nav__link">
<span class="md-ellipsis">
tls.groups
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrap" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wraptype" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapkey" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapkey_path" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapdirection" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.direction
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapforce_cookie" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.force_cookie
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#cipher" class="md-nav__link">
<span class="md-ellipsis">
cipher
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#data_ciphers" class="md-nav__link">
<span class="md-ellipsis">
data_ciphers
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#data_ciphers_fallback" class="md-nav__link">
<span class="md-ellipsis">
data_ciphers_fallback
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#auth" class="md-nav__link">
<span class="md-ellipsis">
auth
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix" class="md-nav__link">
<span class="md-ellipsis">
mss_fix
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix_disabled" class="md-nav__link">
<span class="md-ellipsis">
mss_fix_disabled
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix_mode" class="md-nav__link">
<span class="md-ellipsis">
mss_fix_mode
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#replay_window" class="md-nav__link">
<span class="md-ellipsis">
replay_window
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#replay_window_time" class="md-nav__link">
<span class="md-ellipsis">
replay_window_time
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#push" class="md-nav__link">
<span class="md-ellipsis">
push
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushroutes" class="md-nav__link">
<span class="md-ellipsis">
push.routes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdns" class="md-nav__link">
<span class="md-ellipsis">
push.dns
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdns_servers" class="md-nav__link">
<span class="md-ellipsis">
push.dns_servers
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushsearch_domains" class="md-nav__link">
<span class="md-ellipsis">
push.search_domains
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdhcp_options" class="md-nav__link">
<span class="md-ellipsis">
push.dhcp_options
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushredirect_gateway" class="md-nav__link">
<span class="md-ellipsis">
push.redirect_gateway
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushredirect_gateway_flags" class="md-nav__link">
<span class="md-ellipsis">
push.redirect_gateway_flags
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushblock_outside_dns" class="md-nav__link">
<span class="md-ellipsis">
push.block_outside_dns
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushping_interval" class="md-nav__link">
<span class="md-ellipsis">
push.ping_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushping_restart" class="md-nav__link">
<span class="md-ellipsis">
push.ping_restart
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#ping_interval" class="md-nav__link">
<span class="md-ellipsis">
ping_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#ping_restart" class="md-nav__link">
<span class="md-ellipsis">
ping_restart
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_interval" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_disabled" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_disabled
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_bytes" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_bytes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_packets" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_packets
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#handshake_window" class="md-nav__link">
<span class="md-ellipsis">
handshake_window
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#udp-nat-fields" class="md-nav__link">
<span class="md-ellipsis">
UDP NAT Fields
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--section md-nav__item--nested">
<input class="md-nav__toggle md-toggle md-toggle--indeterminate" type="checkbox" id="__nav_5_13" >
<div class="md-nav__link md-nav__container">
<a href="../../inbound/" class="md-nav__link ">
<span class="md-ellipsis">
Inbound
</span>
</a>
<label class="md-nav__link " for="__nav_5_13" id="__nav_5_13_label" tabindex="">
<span class="md-nav__icon md-icon"></span>
</label>
</div>
<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_5_13_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_5_13">
<span class="md-nav__icon md-icon"></span>
Inbound
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../../inbound/direct/" class="md-nav__link">
<span class="md-ellipsis">
Direct
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/mixed/" class="md-nav__link">
<span class="md-ellipsis">
Mixed
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/socks/" class="md-nav__link">
<span class="md-ellipsis">
SOCKS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/http/" class="md-nav__link">
<span class="md-ellipsis">
HTTP
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/shadowsocks/" class="md-nav__link">
<span class="md-ellipsis">
Shadowsocks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/vmess/" class="md-nav__link">
<span class="md-ellipsis">
VMess
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/trojan/" class="md-nav__link">
<span class="md-ellipsis">
Trojan
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/naive/" class="md-nav__link">
<span class="md-ellipsis">
Naive
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/hysteria/" class="md-nav__link">
<span class="md-ellipsis">
Hysteria
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/shadowtls/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
ShadowTLS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/vless/" class="md-nav__link">
<span class="md-ellipsis">
VLESS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/tuic/" class="md-nav__link">
<span class="md-ellipsis">
TUIC
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/hysteria2/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m23 12-2.44-2.78.34-3.68-3.61-.82-1.89-3.18L12 3 8.6 1.54 6.71 4.72l-3.61.81.34 3.68L1 12l2.44 2.78-.34 3.69 3.61.82 1.89 3.18L12 21l3.4 1.46 1.89-3.18 3.61-.82-.34-3.68zm-10 5h-2v-2h2zm0-4h-2V7h2z"/></svg>
<span class="md-ellipsis">
Hysteria2
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/anytls/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
AnyTLS
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/snell/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
Snell
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../inbound/tun/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
Tun
</span>
</a>
</li>
<li class="md-nav__item">
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VMess
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Trojan
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Naive
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WireGuard
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Hysteria
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ShadowTLS
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VLESS
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TUIC
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Hysteria2
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AnyTLS
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<a href="../../outbound/snell/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
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Snell
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<a href="../../outbound/tor/" class="md-nav__link">
<span class="md-ellipsis">
Tor
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<span class="md-ellipsis">
SSH
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DNS
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<li class="md-nav__item">
<a href="../../outbound/selector/" class="md-nav__link">
<span class="md-ellipsis">
Selector
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<a href="../../outbound/urltest/" class="md-nav__link">
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URLTest
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sing-box API
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<a href="../../service/derp/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
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DERP
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Resolved
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<span class="md-ellipsis">
SSM API
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../service/ccm/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
CCM
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</a>
</li>
<li class="md-nav__item">
<a href="../../service/ocm/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
OCM
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</li>
<li class="md-nav__item">
<a href="../../service/hysteria-realm/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
Hysteria Realm
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</a>
</li>
<li class="md-nav__item">
<a href="../../service/usbip-server/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
USB/IP Server
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../../service/usbip-client/" class="md-nav__link">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 4c1.11 0 2 .89 2 2v12c0 1.11-.89 2-2 2H4c-1.11 0-2-.89-2-2V6c0-1.11.89-2 2-2zM8.5 15V9H7.25v3.5L4.75 9H3.5v6h1.25v-3.5L7.3 15zm5-4.74V9h-4v6h4v-1.25H11v-1.11h2.5v-1.26H11v-1.12zm7 3.74V9h-1.25v4.5h-1.12V10h-1.25v3.5h-1.13V9H14.5v5a1 1 0 0 0 1 1h4a1 1 0 0 0 1-1"/></svg>
<span class="md-ellipsis">
USB/IP Client
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</li>
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Table of contents
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<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#structure" class="md-nav__link">
<span class="md-ellipsis">
Structure
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#listen-fields" class="md-nav__link">
<span class="md-ellipsis">
Listen Fields
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#fields" class="md-nav__link">
<span class="md-ellipsis">
Fields
</span>
</a>
<nav class="md-nav" aria-label="Fields">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#system" class="md-nav__link">
<span class="md-ellipsis">
system
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#name" class="md-nav__link">
<span class="md-ellipsis">
name
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mtu" class="md-nav__link">
<span class="md-ellipsis">
mtu
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mode" class="md-nav__link">
<span class="md-ellipsis">
mode
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#network" class="md-nav__link">
<span class="md-ellipsis">
network
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#remote" class="md-nav__link">
<span class="md-ellipsis">
remote
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#remote_port" class="md-nav__link">
<span class="md-ellipsis">
remote_port
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#max_clients" class="md-nav__link">
<span class="md-ellipsis">
max_clients
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#address" class="md-nav__link">
<span class="md-ellipsis">
address
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#peer_address" class="md-nav__link">
<span class="md-ellipsis">
peer_address
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#peer_address_ipv6" class="md-nav__link">
<span class="md-ellipsis">
peer_address_ipv6
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#topology" class="md-nav__link">
<span class="md-ellipsis">
topology
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#duplicate_cn" class="md-nav__link">
<span class="md-ellipsis">
duplicate_cn
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#users" class="md-nav__link">
<span class="md-ellipsis">
users
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#usersusername" class="md-nav__link">
<span class="md-ellipsis">
users.username
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#userspassword" class="md-nav__link">
<span class="md-ellipsis">
users.password
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#static_key" class="md-nav__link">
<span class="md-ellipsis">
static_key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#static_key_path" class="md-nav__link">
<span class="md-ellipsis">
static_key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#key_direction" class="md-nav__link">
<span class="md-ellipsis">
key_direction
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tls" class="md-nav__link">
<span class="md-ellipsis">
tls
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate_path" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlskey" class="md-nav__link">
<span class="md-ellipsis">
tls.key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlskey_path" class="md-nav__link">
<span class="md-ellipsis">
tls.key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_certificate" class="md-nav__link">
<span class="md-ellipsis">
tls.client_certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_certificate_path" class="md-nav__link">
<span class="md-ellipsis">
tls.client_certificate_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsverify_client_certificate" class="md-nav__link">
<span class="md-ellipsis">
tls.verify_client_certificate
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_name" class="md-nav__link">
<span class="md-ellipsis">
tls.client_name
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsclient_name_type" class="md-nav__link">
<span class="md-ellipsis">
tls.client_name_type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlspeer_fingerprint" class="md-nav__link">
<span class="md-ellipsis">
tls.peer_fingerprint
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscrl_path" class="md-nav__link">
<span class="md-ellipsis">
tls.crl_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_ku" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_ku
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_eku" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_eku
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsremote_certificate_tls" class="md-nav__link">
<span class="md-ellipsis">
tls.remote_certificate_tls
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscertificate_profile" class="md-nav__link">
<span class="md-ellipsis">
tls.certificate_profile
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsns_certificate_type" class="md-nav__link">
<span class="md-ellipsis">
tls.ns_certificate_type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsversion_min" class="md-nav__link">
<span class="md-ellipsis">
tls.version_min
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsversion_max" class="md-nav__link">
<span class="md-ellipsis">
tls.version_max
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscipher" class="md-nav__link">
<span class="md-ellipsis">
tls.cipher
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlsgroups" class="md-nav__link">
<span class="md-ellipsis">
tls.groups
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrap" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wraptype" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapkey" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.key
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapkey_path" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.key_path
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapdirection" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.direction
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#tlscontrol_wrapforce_cookie" class="md-nav__link">
<span class="md-ellipsis">
tls.control_wrap.force_cookie
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#cipher" class="md-nav__link">
<span class="md-ellipsis">
cipher
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#data_ciphers" class="md-nav__link">
<span class="md-ellipsis">
data_ciphers
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#data_ciphers_fallback" class="md-nav__link">
<span class="md-ellipsis">
data_ciphers_fallback
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#auth" class="md-nav__link">
<span class="md-ellipsis">
auth
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix" class="md-nav__link">
<span class="md-ellipsis">
mss_fix
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix_disabled" class="md-nav__link">
<span class="md-ellipsis">
mss_fix_disabled
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#mss_fix_mode" class="md-nav__link">
<span class="md-ellipsis">
mss_fix_mode
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#replay_window" class="md-nav__link">
<span class="md-ellipsis">
replay_window
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#replay_window_time" class="md-nav__link">
<span class="md-ellipsis">
replay_window_time
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#push" class="md-nav__link">
<span class="md-ellipsis">
push
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushroutes" class="md-nav__link">
<span class="md-ellipsis">
push.routes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdns" class="md-nav__link">
<span class="md-ellipsis">
push.dns
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdns_servers" class="md-nav__link">
<span class="md-ellipsis">
push.dns_servers
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushsearch_domains" class="md-nav__link">
<span class="md-ellipsis">
push.search_domains
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushdhcp_options" class="md-nav__link">
<span class="md-ellipsis">
push.dhcp_options
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushredirect_gateway" class="md-nav__link">
<span class="md-ellipsis">
push.redirect_gateway
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushredirect_gateway_flags" class="md-nav__link">
<span class="md-ellipsis">
push.redirect_gateway_flags
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushblock_outside_dns" class="md-nav__link">
<span class="md-ellipsis">
push.block_outside_dns
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushping_interval" class="md-nav__link">
<span class="md-ellipsis">
push.ping_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#pushping_restart" class="md-nav__link">
<span class="md-ellipsis">
push.ping_restart
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#ping_interval" class="md-nav__link">
<span class="md-ellipsis">
ping_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#ping_restart" class="md-nav__link">
<span class="md-ellipsis">
ping_restart
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_interval" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_interval
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_disabled" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_disabled
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_bytes" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_bytes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#renegotiate_packets" class="md-nav__link">
<span class="md-ellipsis">
renegotiate_packets
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#handshake_window" class="md-nav__link">
<span class="md-ellipsis">
handshake_window
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="#udp-nat-fields" class="md-nav__link">
<span class="md-ellipsis">
UDP NAT Fields
</span>
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-content" data-md-component="content">
<article class="md-content__inner md-typeset">
<h1 id="openvpn-server">OpenVPN Server</h1>
<div class="admonition question">
<p class="admonition-title">Since sing-box 1.14.0</p>
</div>
<h2 id="structure">Structure</h2>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="p">{</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="w"> </span><span class="nt">&quot;type&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;openvpn-server&quot;</span><span class="p">,</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="w"> </span><span class="nt">&quot;tag&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;ovpn-server&quot;</span><span class="p">,</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a>
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="c1">// Listen Fields</span>
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a>
<a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="w"> </span><span class="nt">&quot;system&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="w"> </span><span class="nt">&quot;name&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a><span class="w"> </span><span class="nt">&quot;mtu&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1500</span><span class="p">,</span>
<a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a><span class="w"> </span><span class="nt">&quot;mode&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;tls&quot;</span><span class="p">,</span>
<a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a><span class="w"> </span><span class="nt">&quot;network&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;udp&quot;</span><span class="p">,</span>
<a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a><span class="w"> </span><span class="nt">&quot;remote&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a><span class="w"> </span><span class="nt">&quot;remote_port&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a><span class="w"> </span><span class="nt">&quot;max_clients&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">1024</span><span class="p">,</span>
<a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a><span class="w"> </span><span class="nt">&quot;address&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-16" name="__codelineno-0-16" href="#__codelineno-0-16"></a><span class="w"> </span><span class="nt">&quot;peer_address&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-17" name="__codelineno-0-17" href="#__codelineno-0-17"></a><span class="w"> </span><span class="nt">&quot;peer_address_ipv6&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-18" name="__codelineno-0-18" href="#__codelineno-0-18"></a><span class="w"> </span><span class="nt">&quot;topology&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;subnet&quot;</span><span class="p">,</span>
<a id="__codelineno-0-19" name="__codelineno-0-19" href="#__codelineno-0-19"></a><span class="w"> </span><span class="nt">&quot;duplicate_cn&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-20" name="__codelineno-0-20" href="#__codelineno-0-20"></a><span class="w"> </span><span class="nt">&quot;users&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[</span>
<a id="__codelineno-0-21" name="__codelineno-0-21" href="#__codelineno-0-21"></a><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-22" name="__codelineno-0-22" href="#__codelineno-0-22"></a><span class="w"> </span><span class="nt">&quot;username&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-23" name="__codelineno-0-23" href="#__codelineno-0-23"></a><span class="w"> </span><span class="nt">&quot;password&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span>
<a id="__codelineno-0-24" name="__codelineno-0-24" href="#__codelineno-0-24"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-0-25" name="__codelineno-0-25" href="#__codelineno-0-25"></a><span class="w"> </span><span class="p">],</span>
<a id="__codelineno-0-26" name="__codelineno-0-26" href="#__codelineno-0-26"></a><span class="w"> </span><span class="nt">&quot;static_key&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-27" name="__codelineno-0-27" href="#__codelineno-0-27"></a><span class="w"> </span><span class="nt">&quot;static_key_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-28" name="__codelineno-0-28" href="#__codelineno-0-28"></a><span class="w"> </span><span class="nt">&quot;key_direction&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-29" name="__codelineno-0-29" href="#__codelineno-0-29"></a><span class="w"> </span><span class="nt">&quot;tls&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-30" name="__codelineno-0-30" href="#__codelineno-0-30"></a><span class="w"> </span><span class="nt">&quot;certificate&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-31" name="__codelineno-0-31" href="#__codelineno-0-31"></a><span class="w"> </span><span class="nt">&quot;certificate_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-32" name="__codelineno-0-32" href="#__codelineno-0-32"></a><span class="w"> </span><span class="nt">&quot;key&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-33" name="__codelineno-0-33" href="#__codelineno-0-33"></a><span class="w"> </span><span class="nt">&quot;key_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-34" name="__codelineno-0-34" href="#__codelineno-0-34"></a><span class="w"> </span><span class="nt">&quot;client_certificate&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-35" name="__codelineno-0-35" href="#__codelineno-0-35"></a><span class="w"> </span><span class="nt">&quot;client_certificate_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-36" name="__codelineno-0-36" href="#__codelineno-0-36"></a><span class="w"> </span><span class="nt">&quot;verify_client_certificate&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;require&quot;</span><span class="p">,</span>
<a id="__codelineno-0-37" name="__codelineno-0-37" href="#__codelineno-0-37"></a><span class="w"> </span><span class="nt">&quot;client_name&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-38" name="__codelineno-0-38" href="#__codelineno-0-38"></a><span class="w"> </span><span class="nt">&quot;client_name_type&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;name&quot;</span><span class="p">,</span>
<a id="__codelineno-0-39" name="__codelineno-0-39" href="#__codelineno-0-39"></a><span class="w"> </span><span class="nt">&quot;peer_fingerprint&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-40" name="__codelineno-0-40" href="#__codelineno-0-40"></a><span class="w"> </span><span class="nt">&quot;crl_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-41" name="__codelineno-0-41" href="#__codelineno-0-41"></a><span class="w"> </span><span class="nt">&quot;remote_certificate_ku&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-42" name="__codelineno-0-42" href="#__codelineno-0-42"></a><span class="w"> </span><span class="nt">&quot;remote_certificate_eku&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-43" name="__codelineno-0-43" href="#__codelineno-0-43"></a><span class="w"> </span><span class="nt">&quot;remote_certificate_tls&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-44" name="__codelineno-0-44" href="#__codelineno-0-44"></a><span class="w"> </span><span class="nt">&quot;certificate_profile&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-45" name="__codelineno-0-45" href="#__codelineno-0-45"></a><span class="w"> </span><span class="nt">&quot;ns_certificate_type&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-46" name="__codelineno-0-46" href="#__codelineno-0-46"></a><span class="w"> </span><span class="nt">&quot;version_min&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1.2&quot;</span><span class="p">,</span>
<a id="__codelineno-0-47" name="__codelineno-0-47" href="#__codelineno-0-47"></a><span class="w"> </span><span class="nt">&quot;version_max&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-48" name="__codelineno-0-48" href="#__codelineno-0-48"></a><span class="w"> </span><span class="nt">&quot;cipher&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-49" name="__codelineno-0-49" href="#__codelineno-0-49"></a><span class="w"> </span><span class="nt">&quot;groups&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-50" name="__codelineno-0-50" href="#__codelineno-0-50"></a><span class="w"> </span><span class="nt">&quot;control_wrap&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-51" name="__codelineno-0-51" href="#__codelineno-0-51"></a><span class="w"> </span><span class="nt">&quot;type&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;tls_crypt&quot;</span><span class="p">,</span>
<a id="__codelineno-0-52" name="__codelineno-0-52" href="#__codelineno-0-52"></a><span class="w"> </span><span class="nt">&quot;key&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-53" name="__codelineno-0-53" href="#__codelineno-0-53"></a><span class="w"> </span><span class="nt">&quot;key_path&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-54" name="__codelineno-0-54" href="#__codelineno-0-54"></a><span class="w"> </span><span class="nt">&quot;direction&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-55" name="__codelineno-0-55" href="#__codelineno-0-55"></a><span class="w"> </span><span class="nt">&quot;force_cookie&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span>
<a id="__codelineno-0-56" name="__codelineno-0-56" href="#__codelineno-0-56"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-0-57" name="__codelineno-0-57" href="#__codelineno-0-57"></a><span class="w"> </span><span class="p">},</span>
<a id="__codelineno-0-58" name="__codelineno-0-58" href="#__codelineno-0-58"></a><span class="w"> </span><span class="nt">&quot;cipher&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-59" name="__codelineno-0-59" href="#__codelineno-0-59"></a><span class="w"> </span><span class="nt">&quot;data_ciphers&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-60" name="__codelineno-0-60" href="#__codelineno-0-60"></a><span class="w"> </span><span class="nt">&quot;data_ciphers_fallback&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-61" name="__codelineno-0-61" href="#__codelineno-0-61"></a><span class="w"> </span><span class="nt">&quot;auth&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-62" name="__codelineno-0-62" href="#__codelineno-0-62"></a><span class="w"> </span><span class="nt">&quot;mss_fix&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<a id="__codelineno-0-63" name="__codelineno-0-63" href="#__codelineno-0-63"></a><span class="w"> </span><span class="nt">&quot;mss_fix_disabled&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-64" name="__codelineno-0-64" href="#__codelineno-0-64"></a><span class="w"> </span><span class="nt">&quot;mss_fix_mode&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-65" name="__codelineno-0-65" href="#__codelineno-0-65"></a><span class="w"> </span><span class="nt">&quot;replay_window&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<a id="__codelineno-0-66" name="__codelineno-0-66" href="#__codelineno-0-66"></a><span class="w"> </span><span class="nt">&quot;replay_window_time&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-67" name="__codelineno-0-67" href="#__codelineno-0-67"></a><span class="w"> </span><span class="nt">&quot;push&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-68" name="__codelineno-0-68" href="#__codelineno-0-68"></a><span class="w"> </span><span class="nt">&quot;routes&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-69" name="__codelineno-0-69" href="#__codelineno-0-69"></a><span class="w"> </span><span class="nt">&quot;dns&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-70" name="__codelineno-0-70" href="#__codelineno-0-70"></a><span class="w"> </span><span class="nt">&quot;dns_servers&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-71" name="__codelineno-0-71" href="#__codelineno-0-71"></a><span class="w"> </span><span class="nt">&quot;search_domains&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-72" name="__codelineno-0-72" href="#__codelineno-0-72"></a><span class="w"> </span><span class="nt">&quot;dhcp_options&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-73" name="__codelineno-0-73" href="#__codelineno-0-73"></a><span class="w"> </span><span class="nt">&quot;redirect_gateway&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-74" name="__codelineno-0-74" href="#__codelineno-0-74"></a><span class="w"> </span><span class="nt">&quot;redirect_gateway_flags&quot;</span><span class="p">:</span><span class="w"> </span><span class="p">[],</span>
<a id="__codelineno-0-75" name="__codelineno-0-75" href="#__codelineno-0-75"></a><span class="w"> </span><span class="nt">&quot;block_outside_dns&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-76" name="__codelineno-0-76" href="#__codelineno-0-76"></a><span class="w"> </span><span class="nt">&quot;ping_interval&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-77" name="__codelineno-0-77" href="#__codelineno-0-77"></a><span class="w"> </span><span class="nt">&quot;ping_restart&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span>
<a id="__codelineno-0-78" name="__codelineno-0-78" href="#__codelineno-0-78"></a><span class="w"> </span><span class="p">},</span>
<a id="__codelineno-0-79" name="__codelineno-0-79" href="#__codelineno-0-79"></a><span class="w"> </span><span class="nt">&quot;ping_interval&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-80" name="__codelineno-0-80" href="#__codelineno-0-80"></a><span class="w"> </span><span class="nt">&quot;ping_restart&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-81" name="__codelineno-0-81" href="#__codelineno-0-81"></a><span class="w"> </span><span class="nt">&quot;renegotiate_interval&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;&quot;</span><span class="p">,</span>
<a id="__codelineno-0-82" name="__codelineno-0-82" href="#__codelineno-0-82"></a><span class="w"> </span><span class="nt">&quot;renegotiate_disabled&quot;</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span>
<a id="__codelineno-0-83" name="__codelineno-0-83" href="#__codelineno-0-83"></a><span class="w"> </span><span class="nt">&quot;renegotiate_bytes&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<a id="__codelineno-0-84" name="__codelineno-0-84" href="#__codelineno-0-84"></a><span class="w"> </span><span class="nt">&quot;renegotiate_packets&quot;</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span>
<a id="__codelineno-0-85" name="__codelineno-0-85" href="#__codelineno-0-85"></a><span class="w"> </span><span class="nt">&quot;handshake_window&quot;</span><span class="p">:</span><span class="w"> </span><span class="s2">&quot;1m&quot;</span><span class="p">,</span>
<a id="__codelineno-0-86" name="__codelineno-0-86" href="#__codelineno-0-86"></a>
<a id="__codelineno-0-87" name="__codelineno-0-87" href="#__codelineno-0-87"></a><span class="w"> </span><span class="err">...</span><span class="w"> </span><span class="c1">// UDP NAT Fields</span>
<a id="__codelineno-0-88" name="__codelineno-0-88" href="#__codelineno-0-88"></a><span class="p">}</span>
</code></pre></div>
<div class="admonition note">
<p>You can ignore the JSON Array [] tag when the content is only one item</p>
</div>
<h2 id="listen-fields">Listen Fields</h2>
<p>See <a href="/configuration/shared/listen/">Listen Fields</a> for details. <code>udp_timeout</code> is part of the <a href="#udp-nat-fields">UDP NAT Fields</a> below.</p>
<h2 id="fields">Fields</h2>
<h3 id="system">system</h3>
<p>Use system interface.</p>
<p>Requires privilege and cannot conflict with existing system interfaces.</p>
<p>The endpoint configures interface addresses and MTU but does not install
operating-system routes or DNS settings.</p>
<p>If disabled, sing-box uses the internal network stack.</p>
<h3 id="name">name</h3>
<p>Custom interface name for system interface.</p>
<p>An automatically generated <code>ovpn</code> interface name is used by default.</p>
<h3 id="mtu">mtu</h3>
<p>OpenVPN interface MTU.</p>
<p><code>1500</code> will be used by default.</p>
<h3 id="mode">mode</h3>
<p>OpenVPN session mode, one of <code>tls</code> or <code>static_key</code>.</p>
<p><code>tls</code> is used by default.</p>
<p><code>static_key</code> serves one peer without a TLS control channel or forward secrecy.
It is retained as an explicit compatibility option for immutable deployments.
It does not use <code>tls</code>, <code>users</code>, push options, or TLS renegotiation options.</p>
<h3 id="network">network</h3>
<p>OpenVPN transport network, one of <code>udp</code> or <code>tcp</code>.</p>
<p><code>udp</code> will be used by default.</p>
<p>Only one transport network is served per endpoint; to serve both TCP and UDP,
configure two endpoints with separate <code>address</code> subnets,
matching upstream OpenVPN which requires two server processes.</p>
<h3 id="remote">remote</h3>
<p>Fixed remote peer address for a UDP <code>static_key</code> server.</p>
<p>Required with <code>remote_port</code> in UDP <code>static_key</code> mode. TCP servers accept the
single peer from the listening socket and do not use this field.</p>
<h3 id="remote_port">remote_port</h3>
<p>Fixed remote peer port for a UDP <code>static_key</code> server.</p>
<p>Required with <code>remote</code> in UDP <code>static_key</code> mode.</p>
<h3 id="max_clients">max_clients</h3>
<p>Maximum number of established and pending TLS client sessions.</p>
<p><code>1024</code> is used by default. The value must be smaller than <code>16777216</code>, the size of the OpenVPN peer-id space.</p>
<p><code>static_key</code> mode supports one peer, so this value must be <code>0</code> or <code>1</code>.</p>
<h3 id="address">address</h3>
<p><mark>Required</mark></p>
<p>List of OpenVPN server address prefixes.</p>
<p>At most one IPv4 prefix and one IPv6 prefix are supported.</p>
<p>The prefix address is assigned to the server interface. The masked prefix is used as the client address pool and route.</p>
<p>The first IPv4 and IPv6 prefix addresses are used as the endpoint's local addresses.</p>
<p>In <code>static_key</code> mode these are the local tunnel prefixes rather than address pools.</p>
<h3 id="peer_address">peer_address</h3>
<p>IPv4 tunnel peer address.</p>
<p>Required when an IPv4 <code>address</code> is configured in <code>static_key</code> mode.</p>
<h3 id="peer_address_ipv6">peer_address_ipv6</h3>
<p>IPv6 tunnel peer address.</p>
<p>Required when an IPv6 <code>address</code> is configured in <code>static_key</code> mode.</p>
<h3 id="topology">topology</h3>
<p>OpenVPN topology pushed to clients, one of <code>subnet</code>, <code>p2p</code> or <code>net30</code>.</p>
<p><code>subnet</code> is used by default in TLS mode. <code>p2p</code> is used by default in
<code>static_key</code> mode.</p>
<h3 id="duplicate_cn">duplicate_cn</h3>
<p>Allow multiple active clients with the same authenticated certificate common name or username.</p>
<p>When disabled, a newly authenticated session replaces the existing session with the same identity and reuses its tunnel address when available.</p>
<p>Disabled by default.</p>
<p>Only available in TLS mode.</p>
<h3 id="users">users</h3>
<p>List of OpenVPN username/password users.</p>
<p>If set, clients must pass username/password authentication in addition to any certificate policy configured by <code>tls.verify_client_certificate</code>.</p>
<p>Only available in TLS mode.</p>
<h3 id="usersusername">users.username</h3>
<p>Username.</p>
<h3 id="userspassword">users.password</h3>
<p>Password.</p>
<h3 id="static_key">static_key</h3>
<p>OpenVPN static key content.</p>
<p>Required in <code>static_key</code> mode.</p>
<p>Conflict with <code>static_key_path</code>.</p>
<h3 id="static_key_path">static_key_path</h3>
<p>OpenVPN static key path.</p>
<p>Required in <code>static_key</code> mode when <code>static_key</code> is not set.</p>
<p>Conflict with <code>static_key</code>.</p>
<h3 id="key_direction">key_direction</h3>
<p>Static key direction, one of <code>server</code> or <code>client</code>.</p>
<p>The key is used bidirectionally if empty. Conventionally the server uses
<code>server</code> and the peer uses <code>client</code>.</p>
<p>Only available in <code>static_key</code> mode.</p>
<h3 id="tls">tls</h3>
<p>Required in TLS mode.</p>
<p>OpenVPN control channel TLS configuration.</p>
<h3 id="tlscertificate">tls.certificate</h3>
<p>TLS server certificate content.</p>
<p>Either <code>tls.certificate</code> or <code>tls.certificate_path</code> is required.</p>
<p>Conflict with <code>tls.certificate_path</code>.</p>
<h3 id="tlscertificate_path">tls.certificate_path</h3>
<p>TLS server certificate path.</p>
<p>Either <code>tls.certificate</code> or <code>tls.certificate_path</code> is required.</p>
<p>Conflict with <code>tls.certificate</code>.</p>
<h3 id="tlskey">tls.key</h3>
<p>TLS server private key content.</p>
<p>Either <code>tls.key</code> or <code>tls.key_path</code> is required.</p>
<p>Conflict with <code>tls.key_path</code>.</p>
<h3 id="tlskey_path">tls.key_path</h3>
<p>TLS server private key path.</p>
<p>Either <code>tls.key</code> or <code>tls.key_path</code> is required.</p>
<p>Conflict with <code>tls.key</code>.</p>
<h3 id="tlsclient_certificate">tls.client_certificate</h3>
<p>TLS CA certificate content, used to verify client certificates.</p>
<p>One of <code>tls.client_certificate</code>, <code>tls.client_certificate_path</code>, or <code>tls.peer_fingerprint</code> is required when <code>tls.verify_client_certificate</code> is <code>require</code> or <code>optional</code>.</p>
<p>Conflict with <code>tls.client_certificate_path</code>.</p>
<h3 id="tlsclient_certificate_path">tls.client_certificate_path</h3>
<p>TLS CA certificate path, used to verify client certificates.</p>
<p>One of <code>tls.client_certificate</code>, <code>tls.client_certificate_path</code>, or <code>tls.peer_fingerprint</code> is required when <code>tls.verify_client_certificate</code> is <code>require</code> or <code>optional</code>.</p>
<p>Conflict with <code>tls.client_certificate</code>.</p>
<h3 id="tlsverify_client_certificate">tls.verify_client_certificate</h3>
<p>OpenVPN client certificate policy, one of <code>require</code>, <code>optional</code> or <code>none</code>.</p>
<p><code>require</code> will be used by default.</p>
<p>If set to <code>optional</code>, a client certificate is verified when provided, but clients without a certificate are allowed.</p>
<p>If set to <code>none</code>, client certificates are not requested.</p>
<p>This field does not replace <code>users</code>; when <code>users</code> is set, username/password authentication is still required.</p>
<h3 id="tlsclient_name">tls.client_name</h3>
<p>Expected client certificate name. Disabled when empty.</p>
<h3 id="tlsclient_name_type">tls.client_name_type</h3>
<p>Certificate field matched by <code>tls.client_name</code>, one of <code>subject</code>, <code>name</code>, or <code>name-prefix</code>.</p>
<p><code>name</code> is used by default when <code>tls.client_name</code> is configured.</p>
<h3 id="tlspeer_fingerprint">tls.peer_fingerprint</h3>
<p>Allowed SHA-256 fingerprints of client leaf certificates. Fingerprint-only verification can be used without a client CA.</p>
<h3 id="tlscrl_path">tls.crl_path</h3>
<p>Path to a certificate revocation list used to reject revoked client certificates.</p>
<h3 id="tlsremote_certificate_ku">tls.remote_certificate_ku</h3>
<p>Required client certificate key usage masks in OpenVPN <code>remote-cert-ku</code> format.</p>
<h3 id="tlsremote_certificate_eku">tls.remote_certificate_eku</h3>
<p>Required client certificate extended key usage. Conflict with an explicitly configured <code>tls.remote_certificate_tls</code>.</p>
<h3 id="tlsremote_certificate_tls">tls.remote_certificate_tls</h3>
<p>Client certificate purpose check, one of <code>server</code>, <code>client</code>, or <code>none</code>. <code>client</code> is used by default.</p>
<h3 id="tlscertificate_profile">tls.certificate_profile</h3>
<p>Certificate profile, one of <code>insecure</code>, <code>legacy</code>, <code>preferred</code>, or <code>suiteb</code>.</p>
<p><code>legacy</code> is used by default.</p>
<p><code>insecure</code> accepts MD5- and SHA-1-signed certificate chains and smaller legacy
keys for compatibility with immutable peers. Use it only when the peer cannot
be upgraded. <code>legacy</code> accepts SHA-1 but rejects MD5 signatures; <code>preferred</code>
requires stronger signatures and keys.</p>
<p>When <code>suiteb</code> is selected and <code>tls.cipher</code> is empty, the TLS 1.2 cipher list defaults to the Suite B ECDHE-ECDSA AES-GCM suites. Explicit <code>tls.cipher</code> and <code>tls.groups</code> values are not restricted by the profile.</p>
<h3 id="tlsns_certificate_type">tls.ns_certificate_type</h3>
<p>Deprecated Netscape certificate type check, one of <code>server</code> or <code>client</code>.</p>
<h3 id="tlsversion_min">tls.version_min</h3>
<p>Minimum TLS version. <code>1.2</code> is used by default.</p>
<h3 id="tlsversion_max">tls.version_max</h3>
<p>Maximum TLS version. The maximum supported version is used by default.</p>
<h3 id="tlscipher">tls.cipher</h3>
<p>Colon-separated OpenSSL cipher suite names allowed for TLS 1.2 and earlier.</p>
<p>The default TLS cipher suites are used when empty. TLS 1.3 cipher suites are not controlled by this field.</p>
<h3 id="tlsgroups">tls.groups</h3>
<p>Colon-separated TLS key exchange groups in preference order.</p>
<h3 id="tlscontrol_wrap">tls.control_wrap</h3>
<p>OpenVPN control channel wrapping.</p>
<p>Equivalent to OpenVPN <code>tls-auth</code>, <code>tls-crypt</code> and <code>tls-crypt-v2</code>.</p>
<p>Disabled by default.</p>
<h3 id="tlscontrol_wraptype">tls.control_wrap.type</h3>
<p><mark>Required</mark></p>
<p>Control channel wrapping type, one of <code>tls_auth</code>, <code>tls_crypt</code> or <code>tls_crypt_v2</code>.</p>
<p>For <code>tls_crypt_v2</code>, the key is the server key.</p>
<h3 id="tlscontrol_wrapkey">tls.control_wrap.key</h3>
<p>Control channel wrapping key content.</p>
<p>Either <code>tls.control_wrap.key</code> or <code>tls.control_wrap.key_path</code> is required.</p>
<p>Conflict with <code>tls.control_wrap.key_path</code>.</p>
<h3 id="tlscontrol_wrapkey_path">tls.control_wrap.key_path</h3>
<p>Control channel wrapping key path.</p>
<p>Either <code>tls.control_wrap.key</code> or <code>tls.control_wrap.key_path</code> is required.</p>
<p>Conflict with <code>tls.control_wrap.key</code>.</p>
<h3 id="tlscontrol_wrapdirection">tls.control_wrap.direction</h3>
<p>OpenVPN <code>tls-auth</code> key direction, one of <code>server</code> or <code>client</code>.</p>
<p>Only available when <code>tls.control_wrap.type</code> is <code>tls_auth</code>.</p>
<p><code>server</code> maps to OpenVPN key direction <code>0</code>, and <code>client</code> maps to <code>1</code>; by convention servers use <code>0</code> and clients use <code>1</code>.</p>
<p>If empty, the key is used bidirectionally, matching an omitted <code>key-direction</code> on both peers.</p>
<h3 id="tlscontrol_wrapforce_cookie">tls.control_wrap.force_cookie</h3>
<p>Require <code>tls-crypt-v2</code> clients over UDP to support stateless session cookies.</p>
<p>Only available when <code>tls.control_wrap.type</code> is <code>tls_crypt_v2</code>. When disabled,
clients without cookie support are accepted using the upstream <code>allow-noncookie</code> behavior.</p>
<p>Disabled by default.</p>
<h3 id="cipher">cipher</h3>
<p>Data-channel cipher used in <code>static_key</code> mode.</p>
<p>The upstream static-key default <code>BF-CBC</code> is used when empty. Supported
static-key ciphers are the AES-CBC, ARIA-CBC, Camellia-CBC, DES-CBC,
Blowfish-CBC, CAST5-CBC families, <code>SEED-CBC</code>, <code>SM4-CBC</code>, and <code>NONE</code>.</p>
<p>Only available in <code>static_key</code> mode. <code>NONE</code> provides no confidentiality.</p>
<h3 id="data_ciphers">data_ciphers</h3>
<p>Allowed OpenVPN data channel ciphers.</p>
<p><code>AES-256-GCM</code>, <code>AES-128-GCM</code> and <code>CHACHA20-POLY1305</code> are used by default.</p>
<p>The AES-GCM family includes <code>AES-192-GCM</code>. Retained ciphers include the CBC,
CFB, and OFB forms of AES, ARIA, Camellia, DES, Blowfish, and CAST5, the CBC,
CFB, and OFB forms of SEED and SM4, and <code>NONE</code>. CFB and OFB are available only
in TLS mode. Legacy ciphers provide weaker or no confidentiality and are not
enabled by default.</p>
<p>Only available in TLS mode.</p>
<h3 id="data_ciphers_fallback">data_ciphers_fallback</h3>
<p>OpenVPN data channel cipher for legacy clients that do not support cipher negotiation.</p>
<p>Equivalent to OpenVPN <code>data-ciphers-fallback</code>.</p>
<p>Disabled by default.</p>
<p>Only available in TLS mode.</p>
<h3 id="auth">auth</h3>
<p>OpenVPN data channel authentication digest.</p>
<p><code>SHA1</code> will be used by default, matching the upstream default; it only applies to non-AEAD data ciphers and <code>tls_auth</code>.</p>
<p>Legacy digests including <code>MD5</code> and <code>RIPEMD160</code> remain available when explicitly
configured for compatibility.</p>
<h3 id="mss_fix">mss_fix</h3>
<p>Maximum encapsulated packet size used to clamp TCP MSS. The upstream default calculation uses <code>1492</code> with the default MTU.</p>
<h3 id="mss_fix_disabled">mss_fix_disabled</h3>
<p>Disable MSS clamping, including the default clamp.</p>
<h3 id="mss_fix_mode">mss_fix_mode</h3>
<p>Calculation mode for an explicit <code>mss_fix</code>, one of <code>mtu</code> or <code>fixed</code>. Requires <code>mss_fix</code>.</p>
<h3 id="replay_window">replay_window</h3>
<p>UDP data-channel replay window size. <code>64</code> is used by default; TCP packet IDs remain strictly consecutive.</p>
<h3 id="replay_window_time">replay_window_time</h3>
<p>UDP replay window duration. <code>15s</code> is used by default. The value must use whole seconds.</p>
<h3 id="push">push</h3>
<p>Options pushed to clients.</p>
<h3 id="pushroutes">push.routes</h3>
<p>Routes to push to clients.</p>
<p>IPv4 and IPv6 prefixes can be mixed.</p>
<h3 id="pushdns">push.dns</h3>
<p>DNS server addresses to push to clients.</p>
<p>Uses legacy <code>dhcp-option DNS</code>/<code>DNS6</code>. A pushed modern DNS server group overrides these addresses on compatible clients.</p>
<h3 id="pushdns_servers">push.dns_servers</h3>
<p>Modern OpenVPN DNS server groups to push. Each entry contains <code>priority</code>, <code>addresses</code>, optional <code>resolve_domains</code>, <code>dnssec</code>, <code>transport</code>, and <code>sni</code>.</p>
<p>Addresses accept an IP address or <code>IP:port</code> (IPv6 ports use <code>[IPv6]:port</code>). <code>transport</code> is one of <code>plain</code>, <code>dot</code>, or <code>doh</code>; <code>dnssec</code> is one of <code>yes</code>, <code>optional</code>, or <code>no</code>. OpenVPN clients apply only the group with the lowest priority number.</p>
<h3 id="pushsearch_domains">push.search_domains</h3>
<p>Modern OpenVPN search domains to push.</p>
<h3 id="pushdhcp_options">push.dhcp_options</h3>
<p>Additional legacy <code>dhcp-option</code> values to push, without the <code>dhcp-option</code> prefix.</p>
<h3 id="pushredirect_gateway">push.redirect_gateway</h3>
<p>Push <code>redirect-gateway</code> to clients, which routes client traffic through the VPN according to <code>push.redirect_gateway_flags</code>.</p>
<p>When <code>push.redirect_gateway_flags</code> is empty, <code>def1</code> is used by default.</p>
<h3 id="pushredirect_gateway_flags">push.redirect_gateway_flags</h3>
<p>OpenVPN <code>redirect-gateway</code> flags to push to clients.</p>
<p>Only available when <code>push.redirect_gateway</code> is enabled.</p>
<p><code>def1</code> is used by default.</p>
<h3 id="pushblock_outside_dns">push.block_outside_dns</h3>
<p>Push <code>block-outside-dns</code> to clients, which blocks DNS queries outside the VPN on Windows clients.</p>
<h3 id="pushping_interval">push.ping_interval</h3>
<p>OpenVPN <code>ping</code> interval pushed to clients.</p>
<p>After the interval passes without sending a packet, the client sends a data-channel ping to the server.</p>
<p>The value must use whole seconds.</p>
<p>Disabled by default.</p>
<h3 id="pushping_restart">push.ping_restart</h3>
<p>OpenVPN <code>ping-restart</code> timeout pushed to clients.</p>
<p>After the timeout passes without receiving a packet, the client reconnects to the server.</p>
<p>The value must use whole seconds.</p>
<p>Disabled by default.</p>
<h3 id="ping_interval">ping_interval</h3>
<p>Interval after which the server sends a data-channel ping when no packet has been sent to a client.</p>
<p>This value applies to the server. Use <code>push.ping_interval</code> to configure clients.</p>
<p>The value must use whole seconds.</p>
<p>Disabled by default.</p>
<h3 id="ping_restart">ping_restart</h3>
<p>Time without receiving a packet after which the server closes the client session.</p>
<p>This value applies to the server. Use <code>push.ping_restart</code> to configure clients.</p>
<p>The server timeout should be longer than the client timeout so the client can reconnect before the server discards its session.</p>
<p>The value must use whole seconds.</p>
<p>Disabled by default.</p>
<h3 id="renegotiate_interval">renegotiate_interval</h3>
<p>OpenVPN TLS renegotiation interval.</p>
<p>When empty, the OpenVPN default <code>1h</code> is used.</p>
<p>Only available in TLS mode.</p>
<h3 id="renegotiate_disabled">renegotiate_disabled</h3>
<p>Disable time-based TLS renegotiation, including the default interval.</p>
<p>Only available in TLS mode.</p>
<h3 id="renegotiate_bytes">renegotiate_bytes</h3>
<p>Renegotiate data-channel keys after this many bytes. <code>0</code> uses the cipher-dependent OpenVPN default.</p>
<p>Only available in TLS mode.</p>
<h3 id="renegotiate_packets">renegotiate_packets</h3>
<p>Renegotiate data-channel keys after this many packets. <code>0</code> uses the cipher-dependent OpenVPN default.</p>
<p>Only available in TLS mode.</p>
<h3 id="handshake_window">handshake_window</h3>
<p>Maximum time allowed for the initial TLS handshake and each TLS renegotiation.</p>
<p><code>1m</code> is used by default.</p>
<p>Only available in TLS mode.</p>
<h2 id="udp-nat-fields">UDP NAT Fields</h2>
<p>These fields configure UDP sessions for traffic through the OpenVPN interface.</p>
<p>See <a href="/configuration/shared/udp-nat/">UDP NAT Fields</a> for details.</p>
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