[Shorewall-users] open port 25

Jim Van Eeckhoutte jim@vaneeckhoutte.com
Tue, 14 May 2002 08:50:51 -0700

Original problem: can you "telnet mail.shorewall.net 25" from 
>behind your firewall?
 no I cannot.
But I noticed that when i use vpn (win2k behind firewall) to home router i can telnet.
---------- Original Message ----------------------------------
From: Tom Eastep <teastep@shorewall.net>
Date:  Tue, 14 May 2002 06:32:32 -0700 (PDT)

>On Mon, 13 May 2002, Jim Van Eeckhoutte wrote:
>> How do I open port 25? Went with default install and cant seem to telnet
>> to outside smtp server. Also nmap from outside shows 25 closed.
>You are having a problem connecting from INSIDE to OUTSIDE. nmap running 
>OUTSIDE is telling you that the firewall is preventing connections from 
>If you need to open SMTP from OUTSIDE to INSIDE (which I doubt), the "how"  
>depends on where your mail server is running. If it's running behind the
>firewall, you probably need a port forwarding rule for port 25; if it is
>running on the firewall itself, then you simply need a rule that allows 
>TCP port 25 from the net to the firewall.
>As to your original problem -- can you "telnet mail.shorewall.net 25" from 
>behind your firewall?
>Tom Eastep    \ Shorewall - iptables made easy
>AIM: tmeastep  \ http://www.shorewall.net
>ICQ: #60745924  \ teastep@shorewall.net
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