Meta Kernel

Another Clash Kernel.

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

Wiki

Documentation is available on Clash.Meta Wiki.

Build

You should install golang first.

Then get the source code of Clash.Meta:

git clone https://github.com/MetaCubeX/Clash.Meta.git
cd Clash.Meta && go mod download

If you can't visit github,you should set proxy first:

go env -w GOPROXY=https://goproxy.io,direct

Now you can build it:

go build

If you need gvisor for tun stack, build with:

go build -tags with_gvisor

Advanced usage of this fork

DNS configuration

Support geosite with fallback-filter.

Restore Redir remote resolution.

Support resolve ip with a Proxy Tunnel.

proxy-groups:
  - name: DNS
    type: url-test
    use:
      - HK
    url: http://cp.cloudflare.com
    interval: 180
    lazy: true

dns:
  enable: true
  use-hosts: true
  ipv6: false
  enhanced-mode: redir-host
  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:
    - "https://1.0.0.1/dns-query#DNS" # append the proxy adapter name or group name to the end of DNS URL with '#' prefix.
    - "tls://8.8.4.4:853#DNS"
  fallback-filter:
    geoip: false
    geosite:
      - gfw # `geosite` filter only use fallback server to resolve ip, prevent DNS leaks to unsafe DNS providers.
    domain:
      - +.example.com
    ipcidr:
      - 0.0.0.0/32

TUN configuration

Supports macOS, Linux and Windows.

Built-in Wintun driver.

# Enable the TUN listener
tun:
  enable: true
  stack: system #   system/gvisor
  dns-hijack:
    - 0.0.0.0:53 # additional dns server listen on TUN
  auto-route: true # auto set global route

Rules configuration

• Support rule GEOSITE.
• Support rule-providers RULE-SET.
• Support multiport condition for rule SRC-PORT and DST-PORT.
• Support network condition for all rules.
• Support source IPCIDR condition for all rules, just append to the end.
• The GEOSITE databases via https://github.com/Loyalsoldier/v2ray-rules-dat.

rules:
  # network(tcp/udp) 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,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,private,DIRECT,no-resolve
  - GEOIP,cn,DIRECT

  - MATCH,PROXY

Proxies configuration

Active health detection urltest / fallback (based on tcp handshake, multiple failures within a limited time will actively trigger health detection to use the node)

Support Policy Group Filter

proxy-groups:
  - name: 🚀 HK Group
    type: select
    use:
      - ALL
    filter: "HK"

  - name: 🚀 US Group
    type: select
    use:
      - ALL
    filter: "US"

proxy-providers:
  ALL:
    type: http
    url: "xxxxx"
    interval: 3600
    path: "xxxxx"
    health-check:
      enable: true
      interval: 600
      url: http://www.gstatic.com/generate_204

Support outbound transport protocol VLESS.

The XTLS support (TCP/UDP) transport by the XRAY-CORE.

proxies:
  - name: "vless"
    type: vless
    server: server
    port: 443
    uuid: uuid
    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
    tls: true
    udp: true
    network: ws
    servername: example.com # priority over wss host
    # skip-cert-verify: true
    ws-opts:
      path: /path
      headers: { Host: example.com, Edge: "12a00c4.fm.huawei.com:82897" }

  - name: "vless-grpc"
    type: vless
    server: server
    port: 443
    uuid: uuid
    tls: true
    udp: true
    network: grpc
    servername: example.com # priority over wss host
    # skip-cert-verify: true
    grpc-opts:
      grpc-service-name: grpcname

Support outbound transport protocol Wireguard

proxies:
  - name: "wg"
    type: wireguard
    server: 162.159.192.1
    port: 2480
    ip: 172.16.0.2
    ipv6: fd01:5ca1:ab1e:80fa:ab85:6eea:213f:f4a5
    private-key: eCtXsJZ27+4PbhDkHnB923tkUn2Gj59wZw5wFA75MnU=
    public-key: Cr8hWlKvtDt7nrvf+f0brNQQzabAqrjfBvas9pmowjo=
    udp: true

Support outbound transport protocol Tuic

proxies:
  - name: "tuic"
    server: www.example.com
    port: 10443
    type: tuic
    token: TOKEN
    # ip: 127.0.0.1 # for overwriting the DNS lookup result of the server address set in option 'server'
    # heartbeat-interval: 10000
    # alpn: [h3]
    # disable-sni: true
    reduce-rtt: true
    # request-timeout: 8000
    udp-relay-mode: native # Available: "native", "quic". Default: "native"
    # congestion-controller: bbr # Available: "cubic", "new_reno", "bbr". Default: "cubic"
    # max-udp-relay-packet-size: 1500
    # fast-open: true
    # skip-cert-verify: true

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'

General installation guide for Linux

• Create user given name clash-meta

• Download and decompress pre-built binaries from releases

• Rename executable file to Clash-Meta and move to /usr/local/bin/

• Create folder /etc/Clash-Meta/ as working directory

Run Meta Kernel by user clash-meta as a daemon.

Create the systemd configuration file at /etc/systemd/system/Clash-Meta.service:

[Unit]
Description=Clash-Meta Daemon, Another Clash Kernel.
After=network.target NetworkManager.service systemd-networkd.service iwd.service

[Service]
Type=simple
User=clash-meta
Group=clash-meta
LimitNPROC=500
LimitNOFILE=1000000
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_RAW CAP_NET_BIND_SERVICE
AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW CAP_NET_BIND_SERVICE
Restart=always
ExecStartPre=/usr/bin/sleep 1s
ExecStart=/usr/local/bin/Clash-Meta -d /etc/Clash-Meta

[Install]
WantedBy=multi-user.target

Launch clashd on system startup with:

$ systemctl enable Clash-Meta

Launch clashd immediately with:

$ systemctl start Clash-Meta

Display Process name

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

To display process name in GUI please use Razord-meta.

Dashboard

We also made a custom fork of yacd provide better support for this project, check it out at Yacd-meta

Development

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

Debugging

Check wiki to get an instruction on using debug API.

Credits

• Dreamacro/clash
• SagerNet/sing-box
• riobard/go-shadowsocks2
• v2ray/v2ray-core
• WireGuard/wireguard-go
• yaling888/clash-plus-pro

License

This software is released under the GPL-3.0 license.