[nsd-users] Logfile/verbosity and master/slave

Adapa, Srinivasa Srinivasa.Adapa at neustar.biz
Mon Dec 15 17:54:35 CET 2008



My experience shows TCPdump analysis is useful at smaller scale, but it
takes significant amount of resources to compute/analyze large scale
deployments with high volume traffic. I wish NSD logs query syntax errors
provided you turn on the special log level.

I think most useful thing is traffic monitoring/analysis via NSD stats.
However, NSD  stats needs improvement and should match bind features at
minimum to be really practical. I am 100% sure that NSD doesn't log per zone
stats as bind does. Tests indicate the NSD stats has some flaws with zone
transfers in conjunction with status interval.

Thanks,
Srini

On 12/14/08 11:56 AM, "Arnt Gulbrandsen" <arnt at gulbrandsen.priv.no> wrote:

> Matthijs Mekking writes:
>> I am not to keen about putting this type of logging in-server and I
>> agree with Arnt and Wouter that you should tcpdump or something to
>> retrieve these queries.
> 
> One thing you could usefully do is mangle the nsd source code to parse
> queries and basically do all the input stuff, but log any and all
> syntax errors and not process valid queries at all. It should NEVER
> send any replies or any other network output.
> 
> The idea would be to have an nsd companion program which one can run on
> a monitor port, or feed input from a tcpdump file, to get quick and
> simple analysis of some kinds of problems.
> 
> Arnt
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