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 From:  mika <mikata at gmail dot com>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Help with dual mail server setup in m0n0wall
 Date:  Thu, 9 Dec 2004 18:58:28 +0100
> > picosecond.com. 86400 IN MX 20 mail.picosecond.com.
> > picosecond.com  86400 IN MX 10 web.picosecond.com.
> > web.picosecond.com   86400 IN A 64.207.38.2
> > mail.picosecond.com. 86400 IN A 64.207.38.4
> >
> > above mail servers have an internal address of 192.168.1.55 and
> > 192.168.160 respectively.
>    External port range  from:    SMTP
>                           to:    SMTP
>    NAT IP:  192.168.1.55
>    Local port:  SMTP
>    Description:  SMTP to Web

Thats Wrong! The External port must not be set to SMTP, because every
TCP connection by a normal computer has a starting port of > 1024 ! So
leave this free!

>    Check the "Auto-add a firewall rule to permit traffic through this
> NAT rule"
> and
>    Interface:  WAN
>    External address:  64.207.38.4 (pick from pull down)
>    Protocol:  TCP
>    External port range  from:    SMTP
>                           to:    SMTP
>    NAT IP:  192.168.1.60
>    Local port:  SMTP
>    Description:  SMTP to Mail

Here, too!