[vox-tech] Tracking down a "redirect"

[Micah J. Cowan]

On Wed, Jun 14, 2006 at 02:30:54PM -0700, Richard Crawford wrote:
> We're having a strange domain resolution issue, and it's stumped me.  Here's 
> the setup.
> 
> Domain http://unexdlc.ucdavis.edu should be resolving to IP address 
> 152.79.198.9.  However, it is instead resolving to http://extensiondlc.net, 
> which is an entirely different IP address.  Similarly, typing 
> http://152.79.198.9 into a browser brings up extensiondlc.net, which should 
> not be happening.
> 
> When the physical computer which hosts .9 is disconnected from the network, 
> the redirect does not happen.
> 
> There is nothing in the Apache configuration file on .9 which should account 
> for this behavior.  When I execute a traceroute, I'm redirected immediately 
> on the first hop to extensiondlc.
> 
> We're trying to find out where this might be happening.  Can anyone offer some 
> suggestions?

>From your description, it's clear that it has nothing to do with Apache
or HTTP.

You say "... should be resolving to IP address 152.79.198.9." However,
according to dig:

    ;; QUESTION SECTION:
    ;unexdlc.ucdavis.edu.           IN      A

    ;; ANSWER SECTION:
    unexdlc.ucdavis.edu.    7200    IN      CNAME   extensiondlc.net.
    extensiondlc.net.       86364   IN      A       204.11.233.24

so, in fact it isn't. It looks like the UCD nameservers are
misconfigured.

-- 
HTH,

Micah J. Cowan
Programmer, musician, typesetting enthusiast, gamer...
http://micah.cowan.name/