[Server-devel] DNS strangeness on 0.5.2

[Sameer Verma]

On Sun, May 17, 2009 at 6:04 PM, Jerry Vonau <jvonau at shaw.ca> wrote:
> On Sun, 2009-05-17 at 12:42 -0700, Sameer Verma wrote:
>> We have a server with XS -0.5.2 on it, yum updated as of yesterday.
>> When I plug it into my home network, which talks to a WRT54G+dd-wrt
>> over Ethernet, it works fine.
>> When I use the XS on a segment of our campus network, it does not.
>>
>> Details follow:
>>
>> Home network: The XS gets a private IP from the WRT54G on eth0
>> (192.168.89.148). The DNS that XS gets on eth0 points to itself
>> (nameserver 172.18.0.1).
>
> No, that is hard-coded in the /etc/resolv.conf.in file part of the
> xs-config package, which is used with git keep /etc/resolv.conf static.
>

OK. That makes sense.

>> The XOs get IP and DNS from the XS
>> (ip:172.18.10.13 dns 172.18.0.1). Browse on the XO can resolve IPs and
>> FQDN.
>>
>> Campus network: When I use the XS on a segment of our campus network,
>> it gets a public IP from our campus dhcp server (130.212.xxx) but I
>> don't see any SFSU DNS servers in cat /etc/resolv.conf on the XS. Its
>> still points to itself (172.18.0.1) The XO gets IP (172.18.10.13), DNS
>> (172.18.0.1), all as expected. Browse will not go out to say
>> http://verma.sfsu.edu/ but will go out to http://130.212.24.20 which
>> is verma.sfsu.edu's IP.
>>
> On the XO, I guess you can't ping verma.sfsu.edu, but by ip address it
> works?

Yes.

>Can you ping anything else out on the internet by name?
>

No. name pings don't work, but IP works.

> Think you would need to create the domain mapping in named on the XS for
> it to resolve verma.sfsu.edu.
>
>> Any ideas on what's broken? Where should I begin to look?
>>
>
> You could edit /var/named-xs/school.external.zone.db to match your
> external view on eth0.


OK. I'll take a look.

Sameer