Still Having Intermittent Issues Resovling External Domains
Ladislav Vobr
lvobr at ies.etisalat.ae
Tue Jun 1 03:28:10 UTC 2004
you have to troubleshoot more during the problem, the moment it happens,
dump the cache, see what is there, check whether you know about the
nameservers for such a domain, whether they are responding or no, check
the log files, perhaps they are lame, try to query the remote servers
yourself using dig, dig +trace..., check your client.log, perhaps you
are out of recursive clients...
Ladislav
Joel M Nimety wrote:
> We are still experiencing problems:
>
> > We're experiencing intermittent issues resolving domain names. Often
> > these domains are microsoft.com, cnn.com, etc. We are running 3
> > identical servers and sometime they can go a week or two without any
> > trouble (othertimes only hours), then without warning one server will
> > be unable to perform a recursive lookup for a few domains.
> >
> > rndc flush has no effect, restarting bind fixes any problems.
>
> Someone suggested that it may be a firewall issue. We have contacted
> our fw vendor and made changes to allow all dns traffic through. This
> didn't fix the problem.
>
> Next, I installed bind 9.3beta4 on one of the machines and forced edns
> size to 512. About an hour later this box failed.
>
> We are getting desperate. I can provide tcpdumps and configs if
> necessary.
>
> Many thanks to anyone who can help.
>
> --
> Joel Nimety
>
>
>
More information about the bind-users
mailing list