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RE: [FW1] POP3 from inside problems




An explanation and some possible solutions for this is available at http://www.phoneboy.com/fw1/faq/0179.html


For the best solution, you should use internal DNS.

Hakan

At 02:18 25.04.2001 -0700, Dan Hitchcock wrote:

True true true :)

I have never heard a completely satisfying answer for this, but my empirical
experience, you cannot access a server by "bouncing off" the external IP
address and back in.  I've tried with PIX, CP4.x, and Watchguard, all with
the same results.  The answer is usually to set up internal DNS for the
machines you need to access, and educate users accordingly.  If anyone has
an explanation (or, better yet, a solution) to this conundrum, please post.

A thought: if you disable anti-spoofing, does it work?

Dan Hitchcock
Network [email protected]
Xylo, Inc.
The work/life solution for corporate thought leaders


-----Original Message----- From: Martin Flagg [mailto:[email protected]] Sent: Monday, January 15, 2001 2:29 PM To: '[email protected]' Subject: [FW1] POP3 from inside problems



I have an Exchange 5.5 server on a private NATed network.  It send and
recieves SMTP mail fine.  POP3 clients from the outside work fine.  When
users from the inside use the "valid" IP address for the server they cannot
connect with their POP clients to the Exchange server.


Martin D. Flagg Sr. Systems Engineer


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