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

shadowsocks inbound is a shadowsocks server.

Structure

{
  "inbounds": [
    {
      "type": "shadowsocks",
      "tag": "ss-in",
      
      "listen": "::",
      "listen_port": 5353,
      "tcp_fast_open": false,
      "sniff": false,
      "sniff_override_destination": false,
      "domain_strategy": "prefer_ipv6",
      "udp_timeout": 300,
      "network": "udp",
      
      "method": "2022-blake3-aes-128-gcm",
      "password": "8JCsPssfgS8tiRwiMlhARg=="
    }
  ]
}

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.

udp_timeout

UDP NAT expiration time in seconds, default is 300 (5 minutes).

Shadowsocks Fields

network

Listen network, one of tcp udp.

Both if empty.

method

==Required==

Method	Key Length
2022-blake3-aes-128-gcm	16
2022-blake3-aes-256-gcm	32
2022-blake3-chacha20-poly1305	32
none	/
aes-128-gcm	/
aes-192-gcm	/
aes-256-gcm	/
chacha20-ietf-poly1305	/
xchacha20-ietf-poly1305	/

password

==Required==

Method	Password Format
none	/
2022 methods	openssl rand -base64 <Key Length>
other methods	any string

Multi-User Structure

{
  "inbounds": [
    {
      "type": "shadowsocks",
      "method": "2022-blake3-aes-128-gcm",
      "password": "8JCsPssfgS8tiRwiMlhARg==",
      "users": [
        {
          "name": "sekai",
          "password": "PCD2Z4o12bKUoFa3cC97Hw=="
        }
      ]
    }
  ]
}

Relay Structure

{
  "inbounds": [
    {
      "type": "shadowsocks",
      "method": "2022-blake3-aes-128-gcm",
      "password": "8JCsPssfgS8tiRwiMlhARg==",
      "destinations": [
        {
          "name": "test",
          "server": "example.com",
          "server_port": 8080,
          "password": "PCD2Z4o12bKUoFa3cC97Hw=="
        }
      ]
    }
  ]
}