Re: Novell DNS Reverse Lookup
Thorsten Kampe
> I'll try to reword this and see if that helps.
>
> When using Novell DNS as a forwarder to a DNS server, reverse lookups
> (nslookup) doesn't work but name resolution (ping) does work.
>
> What is needed in Novell DNS to allow reverse lookups?
A reverse lookup zone.
Massimo Rosen
You misunderstand the question.
CU,
--
Massimo Rosen
Novell Product Support Forum Sysop
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http://www.cfc-it.de
Massimo Rosen
Michael Fleming wrote:
>
> I'll try to reword this and see if that helps.
>
> When using Novell DNS as a forwarder to a DNS server, reverse lookups
> (nslookup) doesn't work but name resolution (ping) does work.
>
> What is needed in Novell DNS to allow reverse lookups?
Are you sure forwarding from your Novell DNS works *at all*? There are
several unsolved issues with forwarding failing completely with Novell
DNS. In SP7 for instance, forwarding often stopped working after named
was unloaded once, and then loaded again. It would only start working
again after a full server reboot.
In SP8 though, for yet unknown reasons, on a big percentage of servers
(but not all), forwarding doesn't work *at all*. The DNS server will
totally ignore any configured forwarder, and always attempt to use the
root servers.
I'm not aware of any forwarding issue limited to reverse PTR lookups
though. So please confirm forwarding is working at all in your case, and
the issue is really limited to PTR lookups.
Thorsten Kampe
> Thorsten Kampe wrote:
> > * Michael Fleming (Thu, 14 Jan 2010 13:26:03 GMT)
> > > I'll try to reword this and see if that helps.
> > >
> > > When using Novell DNS as a forwarder to a DNS server, reverse lookups
> > > (nslookup) doesn't work but name resolution (ping) does work.
> > >
> > > What is needed in Novell DNS to allow reverse lookups?
> >
> > A reverse lookup zone.
>
> You misunderstand the question.
I don't think so. There is nothing in Novell DNS to allow reverse
lookups. The only thing you need is a reverse lookup zone.
Maybe the question the OP really wanted to ask was "What is needed in
Novell DNS to forward reverse lookups?" but I am really bad at mind
reading.
Thorsten
Massimo Rosen
Thorsten Kampe wrote:
>
> * Massimo Rosen (Thu, 14 Jan 2010 14:38:51 GMT)
> >
> > You misunderstand the question.
>
> I don't think so.
But nevertheless you do.
> There is nothing in Novell DNS to allow reverse
> lookups.
Huh? Would you elaborate on what you mean here? If you mean what you
wrote, you can't possibly be more wrong.
> The only thing you need is a reverse lookup zone.
He's talking about *forwarding*. Quite the opposite, for forwarding you
do *NOT* need to have any zone at all.
> Maybe the question the OP really wanted to ask was "What is needed in
> Novell DNS to forward reverse lookups?" but I am really bad at mind
> reading.
I'm inclined to remove the "mind" in that last sentence. ;) He's
*clearly* talking about forwarding, multiple times, and describes his
setup and problem pretty detailed.
Thorsten Kampe
> Thorsten Kampe wrote:
> > * Massimo Rosen (Thu, 14 Jan 2010 14:38:51 GMT)
> > lookups.
>
> Huh? Would you elaborate on what you mean here? If you mean what you
> wrote, you can't possibly be more wrong.
Could you elaborate on what you mean? If I create a reverse lookup zone
the server will do reverse lookups. You don't have to allow that. If I
configure forwarding then the server will forward. There is also no
option to allow that.
> > The only thing you need is a reverse lookup zone.
>
> He's talking about *forwarding*. Quite the opposite, for forwarding you
> do *NOT* need to have any zone at all.
He's talking about reverse lookups and it seems like he thinks that
there is an option to "allow" that. But there isn't. Either you create
or reverse lookup zone or you configure forwarding. You don't have to
allow it.
> > Maybe the question the OP really wanted to ask was "What is needed in
> > Novell DNS to forward reverse lookups?" but I am really bad at mind
> > reading.
>
> I'm inclined to remove the "mind" in that last sentence. ;) He's
> *clearly* talking about forwarding, multiple times,
I'm accessing the forum via NNTP so the history is long lost.
> and describes his setup and problem pretty detailed.
So then why does he "try to reword this" if everything is so pretty
clear and detailed, hm? For starters, "When using Novell DNS as a
forwarder to a DNS server" is completely unclear. The term "forwarder"
is used in both meanings: the one that forwards and the one that is
forwarded to.
Thorsten
Massimo Rosen
Thorsten Kampe wrote:
>
> * Massimo Rosen (Thu, 14 Jan 2010 15:59:41 GMT)
> > Thorsten Kampe wrote:
> > > * Massimo Rosen (Thu, 14 Jan 2010 14:38:51 GMT)
> > > There is nothing in Novell DNS to allow reverse
> > > lookups.
> >
> > Huh? Would you elaborate on what you mean here? If you mean what you
> > wrote, you can't possibly be more wrong.
>
> Could you elaborate on what you mean? If I create a reverse lookup zone
> the server will do reverse lookups. You don't have to allow that. If I
> configure forwarding then the server will forward. There is also no
> option to allow that.
Language issue. You and me used different meanings of "allow". Your
sentence above sounded as if Novell DNS can not do (=allow) reverse DNS
lookups.
> > > The only thing you need is a reverse lookup zone.
> >
> > He's talking about *forwarding*. Quite the opposite, for forwarding you
> > do *NOT* need to have any zone at all.
>
> He's talking about reverse lookups
...through forwarding, e.g the Novell DNS is supposed and go ask the
configured forwarding server, and it doesn't do that.
> and it seems like he thinks that
> there is an option to "allow" that.
I don't see where you read that from. He's just saying it doesn't work.
> But there isn't. Either you create
> or reverse lookup zone or you configure forwarding. You don't have to
> allow it.
Right. Nevertheless, there are several known problems with forwarding in
general (not related to reverse or regular lookups) both in SP7 and SP8.
SOmetimes it works, sometimes not.
>
> I'm accessing the forum via NNTP so the history is long lost.
That's a problem (configuration issue) of your own newsreader. Our
server doesn't ever remove posts.
> So then why does he "try to reword this" if everything is so pretty
> clear and detailed, hm?
Normal reaction when someone apparently misunderstands you, right?
Doesn't say anything where the misunderstanding comes from.
Massimo Rosen
Michael Fleming wrote:
>
> Thanks for the info guys. Just to clarify.. I am talking about REVERSE
> LOOKUPS aka PTR records that wasn't working.
>
> In the meantime I have setup Novell DNS on a new server in prod and
> didn't have any issues. I just created a DNS server in imanager,
> configured forwarding to DNS server and both ping and nslookup work.
>
> Not sure why it wasn't working in the testlab but if it works in prod
> I'm happy.
>
> Responses much appreciated!
See my previous reply with details. Forwarding *is* a problem in NW DNS.