Hello!
I've ran into a very strange problem. IP masquerading a connection fails to
one certain host, but works for all others.
The setup is as follows: a mail server (Linux 2.0.34) is behind a firewall
(Linux 2.2.13) that masquerades SMTP connections from the mail server to any
other host on the internet.
This works fine, except for one certain host - a "telnet XXX smtp" yields an
immediate "connection closed" when done from the mail server (and qmail
reports "connection died"). The connection can be sucessfully established if
it is initiated on the firewall.
I am cluelss. As far as I can tell, there is no way for XXX (which seems to be
running Microsoft Exchange Server btw) to detect any difference between a masqueraded
connection and a non-masqueraded connection. The only thing I can think of is
that XXX behaives strangely somehow, confusing the firewall's kernel.
I'd appreciate any ideas anyone might have, since this prevents the company
in question from corresponding with anyone at that host through E-Mail.
--
/ Peter Schuller
PGP userID: 0x5584BD98 or 'Peter Schuller <[EMAIL PROTECTED]>'
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