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View the DNS cache on my local bind DNS server?

Posted on 2009-07-12
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Last Modified: 2013-12-06
I have a caching BIND dns server running on Debian. I want to view the cache. Where is it, and how can I access it?
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Question by:itnifl
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Adraenyse earned 250 total points
ID: 24835672
By default, the dump file will appear as named_dump.db in your named directory, pending proper permissions. If you want to move the dump file, add this to your named.conf and execute rndc reload

options {
               dump-file "/var/named/named_dump.db";
}

If you have an options section already, simply add the dump-file variable inside it.

To dump the cache under BIND 8
ndc dumpdb

To dump the cache under BIND 9
rndc dumpdb

One caveat is under BIND 8, both the cache and the authoritative information will be dumped, under BIND 9, only the cache is dumped. You may have some sorting to do.

If you find an entry that you wish to delete without impacting the rest of the cache, and you are running BIND 9.2.0 or later, you can use the command rndc flushname domainname

The domain name does accept wildcards such as *.google.com

Hope that helps
Adrae
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by:itnifl
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Thanks!
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