From: Melvyn Sopacua (postfix-userswebteckies.org)
Date: Mon Nov 03 2003 - 05:13:48 CST

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On Monday 03 November 2003 10:24, Tim Ryan wrote:

> I am not able to telnet to 216.239.16.104 25.
>
> When I open up ipfw with the following I am still not able to telnet into
> that external mail server:
>
> ipfw -f flush
> ipfw add 100 allow all from any to any

That might not work. Explicetely enable natd divertion:
# Divert all packets through the tunnel interface
# This needs to be the very first rule
$fwcmd add 50 divert natd all from any to any via xl0

(xl0 should be your external interface - on the gateway machine of course)

> Is it possible that my ISP is blocking this traffic?

It can be a number of things in the realms of TCP communications.

Things to try:
1) telnet to 'some site on port 80' => shows a working NAT
2) telnet to 'some hotmail smtp server' => shows port 25 is ok
3) call ISP if 2) fails.
4) if 2) succeeds, call ISP with specifics for that site

if 1) fails, slide over to:
http://lists.freebsd.org/mailman/listinfo/freebsd-questions

--
Melvyn
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FreeBSD ghost.lan.webteckies.org 4.9-RC FreeBSD 4.9-RC #6: Wed Oct 1 07:44:36
CEST 2003 rootghost.lan.webteckies.org:/usr/obj/usr/src/sys/GHOST i386
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