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

Getting Started

Documentations are now moved to GitHub Wiki.

Advanced usage for this branch

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: gvisor #  only 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

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

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

[Service]
Type=simple
User=Clash-Meta
Group=Clash-Meta
CapabilityBoundingSet=cap_net_admin
AmbientCapabilities=cap_net_admin
Restart=always
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 Dashboard For Meta.

Development

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

Credits

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

License

This software is released under the GPL-3.0 license.