[ILUG] dns problem

[Conor Wynne]

> Hi,
> I need some help.
> I have a debian woody firewall running caching only nameserver (bind9).
> outside world is on eth1, and local lan on eth0
> I also have a redhat7 mailserver on the eth0 lan.
>
> Most things seem to be working ok, but ...
> I currently have a load of email (well, not a load, only about 20 or so)
> backed up
>  for one destination domain, and mailq tells me ' host name lookup
> failure'
>
> However, if I go to the firewall, and  'dig' that domain it does resolve
> ok.
>
> I dont have dig or nslookup on the mailserver, so cannot  do the same
> dig/nslookup there.
>
> on the mailserver, my  /etc/resolv.conf reads :
> -----------------------------
> domain
> nameserver 192.168.x.x
> ---------------------------

That should be:

search domain.whatever
nameserver ipaddress-of-dns-server

> where 192.168.x.x is the IP of the firewall
>
> Routing seems ok, and fetchmail works from the mailserver to get my odmr
> email ok. (also using dns to resolve the hostname)
> Incoming mail seems ok .. some dns failures for the same domain name I
> have problems sending to ... possibly an error in the config of that
> domain's dns 'setup' ?
>
> How do I go about finding what the problem is ?
>
> Thanks,
> Declan

-- 
Conor Wynne,
Dublin,
Irlande.