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 branch

General configuration

sniffing: true # Sniff TLS SNI

force-cert-verify: true # force verify TLS Certificate, prevent machine-in-the-middle attacks

MITM configuration

A root CA certificate is required, the MITM proxy server will generate a CA certificate file and a CA private key file in your Clash home directory, you can use your own certificate replace it.

Need to install and trust the CA certificate on the client device, open this URL http://mitm.clash/cert.crt by the web browser to install the CA certificate, the host name 'mitm.clash' was always been hijacked.

NOTE: this feature cannot work on tls pinning

WARNING: DO NOT USE THIS FEATURE TO BREAK LOCAL LAWS

# Port of MITM proxy server on the local end
mitm-port: 7894

# Man-In-The-Middle attack
mitm:
  hosts: # use for others proxy type. E.g: TUN, socks
    - +.example.com
  rules: # rewrite rules
    - '^https?://www\.example\.com/1 url reject' # The "reject" returns HTTP status code 404 with no content.
    - '^https?://www\.example\.com/2 url reject-200' # The "reject-200" returns HTTP status code 200 with no content.
    - '^https?://www\.example\.com/3 url reject-img' # The "reject-img" returns HTTP status code 200 with content of 1px png.
    - '^https?://www\.example\.com/4 url reject-dict' # The "reject-dict" returns HTTP status code 200 with content of empty json object.
    - '^https?://www\.example\.com/5 url reject-array' # The "reject-array" returns HTTP status code 200 with content of empty json array.
    - '^https?://www\.example\.com/(6) url 302 https://www.example.com/new-$1'
    - '^https?://www\.(example)\.com/7 url 307 https://www.$1.com/new-7'
    - '^https?://www\.example\.com/8 url request-header (\r\n)User-Agent:.+(\r\n) request-header $1User-Agent: haha-wriohoh$2' # The "request-header" works for all the http headers not just one single header, so you can match two or more headers including CRLF in one regular expression.
    - '^https?://www\.example\.com/9 url request-body "pos_2":\[.*\],"pos_3" request-body "pos_2":[{"xx": "xx"}],"pos_3"'
    - '^https?://www\.example\.com/10 url response-header (\r\n)Tracecode:.+(\r\n) response-header $1Tracecode: 88888888888$2'
    - '^https?://www\.example\.com/11 url response-body "errmsg":"ok" response-body "errmsg":"not-ok"'

DNS configuration

Support resolve ip with a proxy tunnel or interface.

Support geosite with fallback-filter.

Use curl -X POST controllerip:port/cache/fakeip/flush to flush persistence fakeip

dns:
  enable: true
  use-hosts: true
  ipv6: false
  enhanced-mode: fake-ip
  fake-ip-range: 198.18.0.1/16
  listen: 127.0.0.1:6868
  default-nameserver:
    - 119.29.29.29
    - 114.114.114.114
  nameserver:
    - https://doh.pub/dns-query
    - tls://223.5.5.5:853
  fallback:
    - 'tls://8.8.4.4:853#proxy or interface'
    - 'https://1.0.0.1/dns-query#Proxy'  # append the proxy adapter name to the end of DNS URL with '#' prefix.
  fallback-filter:
    geoip: false
    geosite:
      - gfw  # `geosite` filter only use fallback server to resolve ip, prevent DNS leaks to untrusted DNS providers.
    domain:
      - +.example.com
    ipcidr:
      - 0.0.0.0/32

TUN configuration

Simply add the following to the main configuration:

NOTE:

auto-route and auto-detect-interface only available on macOS, Windows and Linux, receive IPv4 traffic

tun:
  enable: true
  stack: system # or gvisor
  # device: tun://utun8 # or fd://xxx, it's optional
  # dns-hijack:
  #   - 8.8.8.8:53
  #   - tcp://8.8.8.8:53
  #   - any:53
  #   - tcp://any:53
  auto-route: true # auto set global route
  auto-detect-interface: true # conflict with interface-name

or

interface-name: en0

tun:
  enable: true
  stack: system # or gvisor
  # dns-hijack:
  #   - 8.8.8.8:53
  #   - tcp://8.8.8.8:53
  auto-route: true # auto set global route

It's recommended to use fake-ip mode for the DNS server.

Clash needs elevated permission to create TUN device:

$ sudo ./clash

Then manually create the default route and DNS server. If your device already has some TUN device, Clash TUN might not work. In this case, fake-ip-filter may helpful.

Enjoy! :)

For Windows:

tun:
  enable: true
  stack: gvisor # or system
  dns-hijack:
    - 198.18.0.2:53 # when `fake-ip-range` is 198.18.0.1/16, should hijack 198.18.0.2:53
  auto-route: true # auto set global route for Windows
  # It is recommended to use `interface-name`
  auto-detect-interface: true # auto detect interface, conflict with `interface-name`

Finally, open the Clash

Rules configuration

• Support rule GEOSITE.
• Support rule USER-AGENT.
• Support multiport condition for rule SRC-PORT and DST-PORT.
• Support network condition for all rules.
• Support process condition for all rules.
• Support source IPCIDR condition for all rules, just append to the end.

The GEOIP databases via https://github.com/Loyalsoldier/geoip.

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

rules:
  # network condition for all rules
  - DOMAIN-SUFFIX,example.com,DIRECT,tcp
  - DOMAIN-SUFFIX,example.com,REJECT,udp

  # process condition for all rules (add 'P:' prefix)
  - DOMAIN-SUFFIX,example.com,REJECT,P:Google Chrome Helper

  # multiport condition for rules SRC-PORT and DST-PORT
  - DST-PORT,123/136/137-139,DIRECT,udp

  # USER-AGENT payload cannot include the comma character, '*' meaning any character.
  - USER-AGENT,*example*,PROXY

  # 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,geolocation-!cn,PROXY

  # source IPCIDR condition for all rules in gateway proxy
  #- GEOSITE,geolocation-!cn,REJECT,192.168.1.88/32,192.168.1.99/32
  
  - GEOIP,telegram,PROXY,no-resolve
  - GEOIP,lan,DIRECT,no-resolve
  - GEOIP,cn,DIRECT

  - MATCH,PROXY

Proxies configuration

Support outbound protocol VLESS.

Support Trojan with XTLS.

Support relay UDP traffic.

Support filtering proxy providers in proxy groups.

Support custom http request header, prefix name and V2Ray subscription URL in proxy providers.

proxies:
  # VLESS
  - name: "vless-tls"
    type: vless
    server: server
    port: 443
    uuid: uuid
    network: tcp
    servername: example.com
    udp: true
    # skip-cert-verify: true
  - name: "vless-xtls"
    type: vless
    server: server
    port: 443
    uuid: uuid
    network: tcp
    servername: example.com
    flow: xtls-rprx-direct # or xtls-rprx-origin
    # flow-show: true # print the XTLS direction log
    # udp: true
    # skip-cert-verify: true

  # Trojan
  - name: "trojan-xtls"
    type: trojan
    server: server
    port: 443
    password: yourpsk
    network: tcp
    flow: xtls-rprx-direct # or xtls-rprx-origin
    # flow-show: true # print the XTLS direction log
    # udp: true
    # sni: example.com # aka server name
    # skip-cert-verify: true

proxy-groups:
  # Relay chains the proxies. proxies shall not contain a relay.
  # Support relay UDP traffic.
  # Traffic: clash <-> ss1 <-> trojan <-> vmess <-> ss2 <-> Internet
  - name: "relay-udp-over-tcp"
    type: relay
    proxies:
      - ss1
      - trojan
      - vmess
      - ss2

  - name: "relay-raw-udp"
    type: relay
    proxies:
      - ss1
      - ss2
      - ss3
        
  - name: "filtering-proxy-providers"
    type: url-test
    url: "http://www.gstatic.com/generate_204"
    interval: 300
    tolerance: 200
    # lazy: true
    filter: "XXX" # a regular expression
    use:
      - provider1

proxy-providers:
  provider1:
    type: http
    url: "url" # support V2Ray subscription URL
    interval: 3600
    path: ./providers/provider1.yaml
    # filter: "xxx"
    # prefix-name: "XXX-"
    header:  # custom http request header
      User-Agent:
        - "Clash/v1.10.6"
    #   Accept:
    #     - 'application/vnd.github.v3.raw'
    #   Authorization:
    #     - ' token xxxxxxxxxxx'
    health-check:
      enable: false
      interval: 1200
      # lazy: false # default value is true
      url: http://www.gstatic.com/generate_204

IPTABLES configuration

Work on Linux OS who's supported iptables

# Enable the TPROXY listener
tproxy-port: 9898

iptables:
  enable: true # default is false
  inbound-interface: eth0 # detect the inbound interface, default is 'lo'

Run 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
CapabilityBoundingSet=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

To display process name online by click http://yacd.clash-plus.cf for local API by Safari or https://yacd.clash-plus.cf for local API by Chrome.

You can download the Dashboard into Clash home directory:

$ cd ~/.config/clash
$ curl -LJ https://github.com/yaling888/yacd/archive/gh-pages.zip -o yacd-gh-pages.zip
$ unzip yacd-gh-pages.zip
$ mv yacd-gh-pages dashboard

Add to config file:

external-controller: 127.0.0.1:9090
external-ui: dashboard

Open http://127.0.0.1:9090/ui/ by web browser.

Plus Pro 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.