Re: ipfw and mail
From: James Housley (jim_at_thehousleys.net)
Date: 06/25/04
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Date: Fri, 25 Jun 2004 15:30:11 -0400 To: "Gustavo A. Baratto" <gbaratto@superb.net>
On Jun 25, 2004, at 2:00 PM, Gustavo A. Baratto wrote:
> 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?
>
I have done that with natd and ipfw. I think you want a forward rule
instead of divert
Jim
-- /"\ ASCII Ribbon Campaign . \ / - NO HTML/RTF in e-mail . X - NO Word docs in e-mail . / \ ----------------------------------------------------------------- jeh@FreeBSD.org http://www.FreeBSD.org The Power to Serve jim@TheHousleys.Net http://www.TheHousleys.net --------------------------------------------------------------------- Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup.
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