dns-dispatcher

Dispatcher is a DNS forwarder, which forwards DNS queries to different DNS resolvers according to local policy, to improve the performance availability or reliability of DNS resolving

The example of such policy file is following:

Example of a policy file

A policy file is a text file contains rules

A rule is a line include : <Source_ip_prefix, Destination_domain , Action>

An action is <Operation [dns_resolver] >

Operation = Drop | refuse | Forward

The following line is a rule to deny access to some bad guys

For any IP in blacklist_ip.txt, and any target domain, Drop the DNS request and repy nothing

blacklist_ip.txt| * | Drop

The following rule is to forward DNS request<from any IP, to any domain in blacklist_domain.txt>

to google's open DNS Resolver ( the information of "google" is defined in resolvers.txt

*| blacklist_domain.txt| Forward:google

The following rule is to forward DNS request <from Tsinghua_ip, to domains in video.txt>

to a dns resolver in China Telecom

tsinghua_ip.txt| video.txt| Forward:telecom

The following rule is to forward DNS request <from CERNET_ip, to domains in video.txt>

to a dns resolver of CCERT

cernet_ip.txt| video.txt| Forward: ccert

For any other request, forward to a default DNS resolver, ccert

*| * | Forward: ccert

Contact or bug report to: cathuhoo At Gmail