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Date:      Sun, 1 Apr 2001 22:27:03 -0400
From:      "Matthew Emmerton" <matt@gsicomp.on.ca>
To:        "Randall Hopper" <aa8vb@nc.rr.com>, "Andrew C. Hornback" <hornback@wireco.net>
Cc:        "FreeBSD Questions" <questions@FreeBSD.ORG>
Subject:   Re: ARG!!! 450 Client host rejected: cannot find your hostnam
Message-ID:  <006b01c0bb1c$685b5bb0$1200a8c0@gsicomp.on.ca>
References:  <20010401191551.A9281@nc.rr.com> <00f501c0bb13$2f4e3080$0e00000a@tomcat> <20010401214448.A12012@nc.rr.com>

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>  |And what do you tell users when they try to use sites that require 128
bit
>  |encryption and that encryption level requires proper resolution of the
>  |address forward and backward?  "Oh, we don't support that, it's not
>  |important..." ?  I can hear a herd of users running for other ISPs...
>
> Ok, you've perked my interest.  What does reverse DNS lookup have to do
> with 128-bit encryption.  You may be implying a specific form of
encryption
> (IPsec or something?).  I use 128-bit/1024-bit encryption in my e-mail
> daily, without reverse DNS ;-)

Many SSL-enabled sites will refuse to connect with clients who have IPs
without proper reverse-DNS entries.  I can't say why, all I know is that
from personal experience, *and* from working with the tech support people at
an ISP I used to work for, this was a real big problem.

--
Matt Emmerton


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