A lightweight yet useful proxy DNS server designed to cope with complicated Internet environment in China, inspired by ChinaDNS , dnsmasq-chinadns and fqdns, powered by Python Twisted.
- Python 3.4
- Twisted
- Tornado for using Tornado IOLoop(optional)
Linux/Mac OS X:
# Clone this project $ sudo python setup.py install
Run sudo simpledns
on your local machine. Then set your DNS server to 127.0.0.1.
$ dig www.twitter.com +short @127.0.0.1
twitter.com.
199.59.149.230
199.59.148.10
199.59.150.7
199.59.150.39
Note that the default cache lifetime depends on the ttl of DNS answer. You may want to set a larger ttl using --min-ttl to extend the cache lifetime.
$ simpledns -h
usage: simpledns [-h] [-b BIND_ADDR] [-p BIND_PORT]
[--upstream-ip UPSTREAM_IP] [--upstream-port UPSTREAM_PORT]
[--query-timeout QUERY_TIMEOUT] [--min-ttl MIN_TTL]
[--max-ttl MAX_TTL] [--cache-size CACHE_SIZE] [-t]
[--hosts-file HOSTS_FILE] [--dispatch-conf DISPATCH_CONF]
[-v {0,1,2}] [-q] [-V]
A lightweight yet useful proxy DNS server
optional arguments:
-h, --help show this help message and exit
-b BIND_ADDR, --bind-addr BIND_ADDR
local address to listen
-p BIND_PORT, --bind-port BIND_PORT
local port to listen
--upstream-ip UPSTREAM_IP
upstream DNS server ip address
--upstream-port UPSTREAM_PORT
upstream DNS server port
--query-timeout QUERY_TIMEOUT
time before close port used for querying
--min-ttl MIN_TTL the minimum time a record is held in cache
--max-ttl MAX_TTL the maximum time a record is held in cache
--cache-size CACHE_SIZE
record cache size
-t, --tcp-server enables TCP serving
--hosts-file HOSTS_FILE
hosts file
--dispatch-conf DISPATCH_CONF
URL dispatch conf file
-v {0,1,2}, --verbosity {0,1,2}
output verbosity
-q, --quiet disable output
-V, --version print version number and exit
Configuration file is at /usr/local/etc/simpledns/dispatch.conf.
Dispatch conf file uses the same rule as in Dnsmasq. 'Address' and 'Server' rules are supported.
address=/example1.com/1.1.1.1
server=/example2.com/1.1.1.2
Default dispatch conf file is from dnsmasq-china-list.
Fake ip list file is at /usr/local/ect/simpledns/iplist/txt. The source is ChinaDNS.
- Config file support
- EDNS support
- Negative caching
MIT License