linux桌面系统上的全局代理程序transproxy

transparent proxy to cross the GFW, cooperate with iptables; also see redsocks: https://github.com/darkk/redsocks

thanks the proxy library from here: https://github.com/phuslu/goproxy/tree/master/httpproxy/proxy

1. compile

   go get -u -v github.com/xiqingping/transproxy/transproxyd/

2. config the iptables:

   # create TRANSPROXYD chain
   iptables -t nat -N TRANSPROXYD
   
   # packets from nobody(transproxyd run as nobody) do not redirect
   iptables -t nat -A TRANSPROXYD -p tcp -m owner --uid-owner nobody -j RETURN
   
   # packets to private net do not redirect
   iptables -t nat -A TRANSPROXYD -d 0.0.0.0/8 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 10.0.0.0/8 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 127.0.0.0/8 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 169.254.0.0/16 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 172.16.0.0/12 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 192.168.0.0/16 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 224.0.0.0/4 -j RETURN
   iptables -t nat -A TRANSPROXYD -d 240.0.0.0/4 -j RETURN
   
   # redirect all tcp packets to port 12345(transproxyd listen on this port)
   iptables -t nat -A TRANSPROXYD -p tcp -j REDIRECT --to-ports 12345
   
   # all output tcp packets jump to TRANSPROXYD chain
   iptables -t nat -A OUTPUT -p tcp  -j TRANSPROXYD
   

3. Run the transproxyd, pls ref the config file under github.com/xiqingping/transproxy/transproxyd

   sudo transproxyd -config /path/to/transproxyd.toml
   

• Uid or Gid in the config must satify to iptables config: 
• iptables -t nat -A TRANSPROXYD -p tcp -m owner --uid-owner nobody -j RETURN
• ListenAddr in the config must satify to iptables config: 
• iptables -t nat -A TRANSPROXYD -p tcp -j REDIRECT --to-ports 12345

from https://github.com/xiqingping/transproxy