[plug] DNS problem - seems to be resolved (pun intended)

[Steve Baker]

----- Original Message -----
From: "Jeremy Malcolm" <Jeremy at Malcolm.wattle.id.au>
To: <plug at plug.linux.org.au>
Sent: Thursday, May 24, 2001 2:47 PM
Subject: Re: [plug] DNS problem - named.conf and zone file


> > As I said before, everything resolves properly if you talk directly to
this
> > nameserver.  Try your own nslookup and see what it does.  When I tell
> > nslookup to use another name server and request these addresses, it
fails
> > with the CNAMES until the name rouble is resolved, then the CNAMES can
be
> > resolved.  Why?
>
> Some binds require the CNAME to be directly under the relevant A
> record.  Try that.
>

OK, I've made that change, and at first glance appears to be working.  I
tried resolving with nslookup via a few local nameservers, and all seemed
OK.  Then I tried via a nameserver that had probably never been used to
resolve to me, a random example was a nameserver at IBM.

> server ns.austin.ibm.com
Default Server:  ns.austin.ibm.com
Address:  192.35.232.34

> www.sg.mercatela.com
Server:  ns.austin.ibm.com
Address:  192.35.232.34

*** ns.austin.ibm.com can't find www.sg.mercatela.com: Non-existent
host/domain
> rouble.sg.mercatela.com
Server:  ns.austin.ibm.com
Address:  192.35.232.34

Name:    rouble.sg.mercatela.com
Address:  203.126.107.242

> www.sg.mercatela.com
Server:  ns.austin.ibm.com
Address:  192.35.232.34

Name:    rouble.sg.mercatela.com
Address:  203.126.107.242
Aliases:  www.sg.mercatela.com

-----------------------

See how www.sg.mercatela.com does not resolve, then rouble does, then www
now can.  Maybe if I try...

> server palrel1.hp.com
Default Server:  palrel1.hp.com
Addresses:  156.153.255.242, 15.81.168.10

> www.sg.mercatela.com
Server:  palrel1.hp.com
Addresses:  156.153.255.242, 15.81.168.10

*** palrel1.hp.com can't find www.sg.mercatela.com: Non-existent host/domain
> www.sg.mercatela.com
Server:  palrel1.hp.com
Addresses:  156.153.255.242, 15.81.168.10

Name:    rouble.sg.mercatela.com
Address:  203.126.107.242
Aliases:  www.sg.mercatela.com

>
-----------------------

Strange - first it doesn't resolve, then it does when I immediately try
again.  Maybe the problem isn't with my configuration after all - maybe it's
a timeout thing at the other end.  (changes setting for timeout on
nslookup) - seems to resolve most of the time now.  That must be it.  Damn -
I should have thought of that earlier.

Thanks to all those who replied, both on and off list.

bakes
--
Steve Baker
Open your mind, then check out www.nexusmagazine.com