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Author Topic: restrict dns look up  (Read 1540 times)

Offline sunlinux

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restrict dns look up
« on: August 10, 2007, 09:08:04 AM »
Can we restrict dns lookup for a particular domain such as for google chat) with iptables or somehow ?

I want to block chat using ( gmail suggested the method to block using above method)

Offline Ricky

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Re: restrict dns look up
« Reply #1 on: August 11, 2007, 12:01:19 AM »
you can either drop queries on port 53 which is for dns but then everything will stop or you can block that particular domain.

See this how a person blocked yahoo messenger using squid

You can also use iptabls to drop that domain request..
Code: [Select]
iptables -A FORWARD -d -j DROP