Great Circle Associates Firewalls
(May 1994)
 

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Subject: Re: Resolving IP Addresses
From: cbenson @ dpc . com (Chuck Benson)
Date: Thu, 5 May 94 14:59:39 -0700
To: firewalls @ greatcircle . com

pjh70 @
 eng .
 amdahl .
 com (Patrick J. Horgan) said:
If the problem is only with some sites, then either it's not your site's
dns problem, or else your dns server is flakey, responding sometimes, and
not others.

I reply:
It may also mean that those sites are doing reverse lookups to see if the host
you say you are from exists, or that the user you indicate that you are exists.

If either of these checks (or some others) is made by to a host with the DNS
not set-up right, (according to the author of the check), you may get a
problem indicated. Also, there are at least some sites that use finger or
something else for their checks. If you wish to name the sites in question,
either here, or in private mail, it may be possible to identify the issue.
It would also make sense to contact the NIC indicated contact for the site,
if it is not one of the newer ones that the NIC has declined to list.

						Chuck Benson

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