Clash

A rule-based tunnel in Go.

Features

• Local HTTP/HTTPS/SOCKS server with authentication support
• VMess, Shadowsocks, Trojan, Snell protocol support for remote connections
• Built-in DNS server that aims to minimize DNS pollution attack impact, supports DoH/DoT upstream and fake IP.
• Rules based off domains, GEOIP, IPCIDR or Process to forward packets to different nodes
• Remote groups allow users to implement powerful rules. Supports automatic fallback, load balancing or auto select node based off latency
• Remote providers, allowing users to get node lists remotely instead of hardcoding in config
• Netfilter TCP redirecting. Deploy Clash on your Internet gateway with iptables.
• Comprehensive HTTP RESTful API controller

Getting Started

Documentations are now moved to GitHub Wiki.

Advanced usage for this fork branch

TUN configuration

Supports macOS, Linux and Windows.

Support lwIP stack, a lightweight TCP/IP stack, recommend set to tun.

On Windows, you should download the Wintun driver and copy wintun.dll into Clash home directory.

# Enable the TUN listener
tun:
  enable: true
  stack: lwip # lwip(recommend), system or gvisor
  dns-listen: 0.0.0.0:53 # additional dns server listen on TUN
  auto-route: true # auto set global route

Rules configuration

• Support rule GEOSITE.
• Support multiport condition for rule SRC-PORT and DST-PORT.
• Support not match condition for rule GEOIP.
• Support network condition for all rules.
• Support source IPCIDR condition for all rules, just append to the end.

The GEOSITE and GEOIP databases via https://github.com/Loyalsoldier/v2ray-rules-dat.

rules:
  # network condition for all rules
  - DOMAIN-SUFFIX,bilibili.com,DIRECT,tcp
  - DOMAIN-SUFFIX,bilibili.com,REJECT,udp
    
  # multiport condition for rules SRC-PORT and DST-PORT
  - DST-PORT,123/136/137-139,DIRECT,udp
  
  # rule GEOSITE
  - GEOSITE,category-ads-all,REJECT
  - GEOSITE,icloud@cn,DIRECT
  - GEOSITE,apple@cn,DIRECT
  - GEOSITE,apple-cn,DIRECT
  - GEOSITE,microsoft@cn,DIRECT
  - GEOSITE,facebook,PROXY
  - GEOSITE,youtube,PROXY
  - GEOSITE,geolocation-cn,DIRECT
  - GEOSITE,gfw,PROXY
  - GEOSITE,greatfire,PROXY
  #- GEOSITE,geolocation-!cn,PROXY

  - GEOIP,telegram,PROXY,no-resolve
  - GEOIP,private,DIRECT,no-resolve
  - GEOIP,cn,DIRECT
    
  # Not match condition for rule GEOIP
  #- GEOIP,!cn,PROXY
    
  # source IPCIDR condition for all rules in gateway proxy
  #- GEOIP,!cn,PROXY,192.168.1.88/32,192.168.1.99/32

  - MATCH,PROXY

Proxies configuration

Support outbound transport protocol VLESS.

The XTLS only support TCP transport by the XRAY-CORE.

proxies:
  - name: "vless-tcp"
    type: vless
    server: server
    port: 443
    uuid: uuid
    network: tcp
    servername: example.com # AKA SNI
    # flow: xtls-rprx-direct # xtls-rprx-origin  # enable XTLS
    # skip-cert-verify: true
    
  - name: "vless-ws"
    type: vless
    server: server
    port: 443
    uuid: uuid
    udp: true
    network: ws
    servername: example.com # priority over wss host
    # skip-cert-verify: true
    ws-path: /path
    ws-headers:
      Host: example.com

IPTABLES auto-configuration

Only work on Linux OS who support iptables, Clash will auto-configuration iptables for tproxy listener when tproxy-port value isn't zero.

If TPROXY is enabled, the TUN must be disabled.

# Enable the TPROXY listener
tproxy-port: 9898
# Disable the TUN listener
tun:
  enable: false

Create user given name clash.

Run Clash by user clash as a daemon.

Create the systemd configuration file at /etc/systemd/system/clash.service:

[Unit]
Description=Clash daemon, A rule-based proxy in Go.
After=network.target

[Service]
Type=simple
User=clash
Group=clash
CapabilityBoundingSet=cap_net_admin
AmbientCapabilities=cap_net_admin
Restart=always
ExecStart=/usr/local/bin/clash -d /etc/clash

[Install]
WantedBy=multi-user.target

Launch clashd on system startup with:

$ systemctl enable clash

Launch clashd immediately with:

$ systemctl start clash

Display Process name

Add field Process to Metadata and prepare to get process name for Restful API GET /connections.

To display process name in GUI please use https://yaling888.github.io/yacd/.

Premium Release

Release

Development

If you want to build an application that uses clash as a library, check out the the GitHub Wiki

Credits

• riobard/go-shadowsocks2
• v2ray/v2ray-core
• WireGuard/wireguard-go

License

This software is released under the GPL-3.0 license.