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Is This Attack On Named

Found every day in logcheck report

     
3:14 pm on Dec 15, 2006 (gmt 0)

Junior Member

10+ Year Member

joined:Jan 4, 2006
posts:77
votes: 0


Hello,

Almost every 4 hours when I receive my logcheck report I find entries like these:

Dec 15 07:26:05 ns named[1916]: client 201.16.18.3#4664: error sending response: host unreachable
Dec 15 07:26:05 ns named[1916]: client 201.16.18.3#4664: error sending response: host unreachable
Dec 15 07:26:05 ns named[1916]: client 201.16.18.3#4664: error sending response: host unreachable
Dec 15 07:26:44 ns last message repeated 5 times
Dec 15 07:26:44 ns last message repeated 5 times
Dec 15 07:26:44 ns last message repeated 5 times

What exactly does this mean? Is it an attack on my DNS server or someone trying to use it?

Thanks!

4:20 pm on Dec 15, 2006 (gmt 0)

Senior Member

WebmasterWorld Senior Member 10+ Year Member

joined:Mar 31, 2003
posts:1316
votes: 0


It's saying that someone is making a request to your server, but the reply can't get through to them. That happens sometimes due to firewall or network issues. If it's just one IP, or a few, but not everyone, then there's probably nothing you can do about it.
 

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