[ILUG] Network / DNS Problems

[Vincent Cunniffe]

Niall Richard Murphy wrote:

> On Wed, Nov 21, 2001 at 10:20:03AM -0000, Lemon, Matthew wrote:
> 
> Hi Matt,
> 
> One point to note is that nslookup is not the best debugging tool
> for situations like this. Why?
> 
> Nslookup does a PTR query on the server's IP address (so as
> to tell you its name). It sends this PTR query to the server 
> you specify on the command line, and chokes if this PTR
> lookup fails. So if you don't have the reverse defined you
> can get spurious errors which don't help figuring out what's 
> going on. (In particular "Can't find server name for address
> 172.16.100.1" is suggestive.)


It's not necessary to have the reverse mapped to the same name as
the nameserver, btw. Any valid reverse map is fine.

Regards,

Vin