sing-box/docs/configuration/inbound/socks.md

socks inbound is a socks4, socks4a, socks5 server.

Structure

{
  "inbounds": [
    {
      "type": "socks",
      "tag": "socks-in",
      
      "listen": "::",
      "listen_port": 2080,
      "tcp_fast_open": false,
      "sniff": false,
      "sniff_override_destination": false,
      "domain_strategy": "prefer_ipv6",
      "proxy_protocol": false,

      "users": [
        {
          "username": "admin",
          "password": "admin"
        }
      ]
    }
  ]
}

Socks Fields

users

SOCKS users.

No authentication required if empty.

Listen Fields

listen

==Required==

Listen address.

listen_port

==Required==

Listen port.

tcp_fast_open

Enable tcp fast open for listener.

sniff

Enable sniffing.

See Sniff for details.

sniff_override_destination

Override the connection destination address with the sniffed domain.

If the domain name is invalid (like tor), this will not work.

domain_strategy

One of prefer_ipv4 prefer_ipv6 ipv4_only ipv6_only.

If set, the requested domain name will be resolved to IP before routing.

If sniff_override_destination is in effect, its value will be taken as a fallback.

proxy_protocol

Parse Proxy Protocol in the connection header.