An explanation and some possible solutions for this is available at
http://www.phoneboy.com/fw1/faq/0179.html
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 Engineer
>425.456.3970
>[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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