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Paul's Time Sink

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disable recursion in Bind

Paul Westbrook | 21 February, 2006 17:41

I just noticed that my dns server was being used as a caching dns server for some random host.  In my log files, I was seeing ANY queries for x.h.ctrc.cc.  When I looked at the cache, this was for some encoded data.

Using the documentation on this page, I was able to fix this problem.  The way that I fixed this was to add the following to the options section:

// version statement for security to avoid
// hacking known weaknesses
version "get lost";

// optional - disables all transfers -
// slaves allowed in zone clauses
allow-transfer {"none";};

// optional - disable all recursive queries
allow-recursion {"none";};
recursion no;

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