Confused about DNS issue

[Brad Knowles]

At 7:02 PM +0000 2005-07-07, The Other Mike wrote:

>  Trying to diagnose an email issue to a certain domain.   Doing an
>  NSLOOKUP for the MX record on this particular domain it comes back
>  with a server name (say server.domain.com).

	Keep in mind that "nslookup" is not a good tool for debugging 
problems with the DNS.  Try "dig" instead.

>                                                                    Can
>  someone enlighten me as to what might be going on??   Why can I get
>  the reverse lookup but no host resolution using 2 different
>  ISP's...and why does dnsstuff.com get both with no problem??

	I'd be willing to bet that you have alternative name resolution 
systems (e.g., NIS) that are interfering with your lookups.  Or, you 
may be having problems with reverse DNS.  Either would cause problems 
with nslookup, although I wouldn't expect reverse DNS problems to 
interfere with ping.

	Try using "dig" instead.

-- 
Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

   SAGE member since 1995.  See <http://www.sage.org/> for more info.