Port Forward Sendmail (fixed)

Ethan Vaughn vaughne at home.com
Wed Dec 1 15:41:00 GMT 1999

Port forwarding sendmail seems to be working perfectly now. I'm not sure what was causing the
lag in the mail getting into the boxes and it seems like I've still lost some of the earlier
messages. In the interim I may have changed something in the /etc/hosts file on one or both of
the machines but I'm not sure what made the difference. I'm sorry I didn't monitor it more
closely, but I had a lot going on with this server and was probably fixing a different problem
when this got fixed. I will however walk through the current settings and carefully note the

Ahh, a journey through the ughknown.

Hats off to the Masq team and the Port Forward people.
Ethan Vaughn
vaughne at home.com

Ethan Vaughn wrote:

> Date:   Tue, 30 Nov 1999 11:57:37 -0700
> From:   Ethan Vaughn <vaughne at home.com>
> To:   samba at samba.org
> Subject: Port Forward Sendmail
> Message-ID: <38441E21.528A3D8F at home.com>
> MIME-Version: 1.0
> Content-Type: text/plain; charset=us-ascii
> Content-Transfer-Encoding: 7bit
> What an adventure.
> If anyone has ever port forwarded sendmail, I'd love to hear from you.
> I've got a gateway/firewall server masquerading an internal subnet (both
> RedHat 6.0). I've just installed a Samba file server and moved the mail
> service to it ( and port forwarded port 25 from the
> gateway/firewall machine ( It seems to be working ..but not
> quite:
> My account has a .forward and email *will* go through the gw to the
> e-mail server and get forwarded appropriately on that account. However,
> users that don't have the .forward aren't getting any external e-mail at
> all. But I'm not getting bounced or reject messages either. It's like
> the messages are just getting sucked into the bit void.
> Sendmail is not running on the gw machine. I've walked through the
> resolv.conf, sendmail.cw, hosts, etc. What have I missed? Hints? Ideas?
> My ipmasqadm goes like this:
> /usr/sbin/ipmasqadm portfw -f
> /usr/sbin/ipmasqadm portfw -a -P tcp -L $ExternalIP 25 -R 25
> Thanks in advance.
> ____________________________
> Ethan Vaughn
> vaughne at home.com

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