Thanks, that was it. The firewall was not port forwarding correctly.
I thought that linux's ipchains did that, but one needs another kernel module,
ipmasqadm.
The following 2 commands did the trick:

ipmasqadm portfw -a -P tcp -R 192.168.1.100 25 -L 207.178.203.67 25
ipmasqadm portfw -a -P tcp -L 192.168.1.100 25 -R 207.178.203.67
25                                      

Thank you all for the excellent support.

-Bruce.


Greg Owen wrote:
> 
> > OK, I think I have my firewall masquerading the firewall
> > external IP port 25 to the qmail box internal IP port 25
> >
> > I'm getting connection rejects, when I try to telnet to
> > port 25 on the firewall. This should redirect me to port
> > 25 on the qmail box, right?
> 
>         If your firewall is set up right, it should.  Does your qmail box
> accept connections on port 25 at all?  While logged into your qmail box,
> type 'telnet localhost 25'.  If you get connection refused, then you aren't
> running qmail-smtpd properly.  If your connection is accepted and you get
> the SMTP banner, then test the firewall's port 25 again.  If the first
> suceeds and the second fails, then the firewall is probably not configured
> correctly.
> 
> > I'm not sure that it's the qmail box that's causing the
> > problem, but is there anything I need to do to allow smtp
> > connections from the internet?
> 
>         Not on the connection level.  Once you get port 25 responding to the
> outside world, you may need to tweak your configuration as far  as rcpthosts
> and relaying goes, but first let's get plain old connectivity going.
> 
> --
>         gowen -- Greg Owen -- [EMAIL PROTECTED]
> 
> -
> Posted automagically by a mail2news gateway at muc.de e.V.
> Please direct questions, flames, donations, etc. to [EMAIL PROTECTED]

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