ChinaDNS-C

A DNS forwarder that filters bad IPs. Quite useful if you live in China. This is a port of ChinaDNS to C.

Install

• Linux / Unix

  Download a release.

    ./configure && make
    src/chinadns -l iplist.txt
  

• OpenWRT

  Download precompiled for ar71xx.

  Else build yourself: cd into SDK root, then

    pushd package
    git clone https://github.com/clowwindy/ChinaDNS-C.git
    popd
    make menuconfig # select Network/ChinaDNS
    make
  

• Windows

  Download Python exe version.

Usage

• Linux / Unix

  Run sudo chinadns -l iplist.txt on your local machine. ChinaDNS creates a UDP DNS Server at 0.0.0.0:53.

• OpenWRT

    opkg install ChinaDNS-C_1.0.0_ar71xx.ipk
    /etc/init.d/chinadns start
  

Test if it works correctly:

$ dig @192.168.1.1 www.youtube.com
Server:		192.168.1.1
Address:	192.168.1.1#53

Non-authoritative answer:
www.youtube.com	canonical name = youtube-ui.l.google.com.
youtube-ui.l.google.com	canonical name = youtube-ui-china.l.google.com.
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.102
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.101
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.113
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.100
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.139
Name:	youtube-ui-china.l.google.com
Address: 173.194.72.138

Currently ChinaDNS-C only supports UDP. Builtin OpenWRT init script works with dnsmasq, which handles TCP. If you use it directly without dnsmasq, you need to add a redirect rule for TCP:

iptables -t nat -A PREROUTING -p tcp --dport 53 -j DNAT --to-destination 8.8.8.8:53

Advanced

usage: chinadns [-h] [-l IPLIST_FILE] [-b BIND_ADDR] [-p BIND_PORT]
       [-c CHNROUTE_FILE] [-s DNS] [-v]
Forward DNS requests.

-h, --help            show this help message and exit
-l IPLIST_FILE        path to ip blacklist file
-c CHNROUTE_FILE      path to china route file
-b BIND_ADDR          address that listens, default: 127.0.0.1
-p BIND_PORT          port that listens, default: 53
-s DNS                DNS servers to use, default:
                      114.114.114.114,208.67.222.222,8.8.8.8
-v                    verbose logging

License

MIT

Bugs and Issues

Please visit Issue Tracker

Mailing list: http://groups.google.com/group/shadowsocks