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Date:      Mon, 12 May 2008 15:55:13 +0000
From:      brad davison <demonichandextensions@hotmail.com>
Cc:        <freebsd-questions@freebsd.org>
Subject:   RE: telnet to mail server from outside does not get 220, telnet from inside works
Message-ID:  <BLU116-W147BBFFAD4D53AFA72553FA1CC0@phx.gbl>
In-Reply-To: <20080512174741.U82158@wojtek.tensor.gdynia.pl>
References:  <BLU116-W309DE8D93C9B937FFF824AA1CC0@phx.gbl> <20080512174741.U82158@wojtek.tensor.gdynia.pl>

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> Date: Mon, 12 May 2008 17:49:07 +0200
> From: wojtek@wojtek.tensor.gdynia.pl
> To: demonichandextensions@hotmail.com
> CC: freebsd-questions@freebsd.org
> Subject: Re: telnet to mail server from outside does not get 220, telnet =
from inside works
>=20
> > Trying ::1...
> > Connected to localhost.xxxxxxxxx.com.
> > Escape character is '^]'.
> > 220 email.xxxxxxxxx.com ESMTP Sendmail 8.13.8/8.13.8; Mon, 12 May 2008 =
10:01:39 -0400 (EDT)
> >
> >
> >
> > But if I try the same thing from 'outside' the firewall I get:
> >
> > %telnet email.xxxxxxxxxxxx.com 25
> > Trying 67.x.x.x...
> > Connected to email.xxxxxxxxxxx.com.
> > Escape character is '^]'.
> > Connection closed by foreign host.
> >
> >
> sendmail try to connect to port auth of remote machine. your firewall=20
> probably blocks it just by dropping packets, so it tries until timeout
>=20
> telnet from outside, wait few minutes and you will get a prompt.
>=20
> change your firewall rules to fix it
> _______________________________________________


You get the prize. =20

We have a Cisco ASA, and everything works on port 587, but port 25 has cisc=
o's 'Application Inspection' or something that I need to figure out how to =
turn off.

Thanks for the attention.

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