HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials

HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials (
-   Server Operation (
-   -   BIND Question (

admins 9th April 2013 17:29

BIND Question
Hi all
I've this in my log:
Apr 9 16:21:04 44101 named[6052]: client query (cache) '' denied

What does it means, how can I prevent it on my Ubuntu 12.10?


joemiller 10th April 2013 14:05

I have same problem
Funnily enough I was just searching for the same thing myself yesterday. I managed to find this old article which seems to suggest that this may be someone trying to force your server to contribute to a DDOS attack on another server, in your case By submitting a request that appears to come from, they hope to flood with replies that it didn't ask for. If I'm understanding this correctly, and I hope someone will tell me if I'm not!, the fact that the slog say 'denied' means that your nameserver didn't allow a recursive DNS query, which is as it should be, and there is no cause for alarm. Everything is working as it should. At least that's how I understood it.

Hope this helps!

All times are GMT +2. The time now is 08:14.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.