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Date:      Fri, 25 Jun 2004 11:00:23 -0700
From:      "Gustavo A. Baratto" <gbaratto@superb.net>
To:        freebsd-isp@freebsd.org
Subject:   ipfw and mail
Message-ID:  <028201c45ade$5a6b2f70$6400a8c0@chivas>

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Hello guys,

some of our users' ISPs don't allow them to use port 25, so they cannot =
use out mail server.

I want to open a new port (2525) and forward all packets from 2525 to 25 =
so, they can use mail.

I tried this in IPFW:
0100 119649 44772439 allow tcp from any to me dst-port 25 keep-state
0200      0        0 divert 25 ip from any to me dst-port 2525 =
keep-state
0300 103075 35531648 allow ip from me to any keep-state
0400     60     4530 deny log ip from any to any


If I telnet directly to port 25, I can get the prompt, but if I telnet =
to port 2525, I get a connection refused.

What should I do in ipfw to forward port 2525 to port 25 tranparently?

Thanks



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