Date: Thu, 22 Oct 1998 15:35:11 -0400 (EDT) From: Jim Flowers <jflowers@ezo.net> To: Chad Thunberg <chadth@atvideo.com> Cc: freebsd-security@FreeBSD.ORG, freebsd-questions@FreeBSD.ORG Subject: Re: firewall + internal mail server Message-ID: <Pine.BSI.3.91.981022152536.5748B-100000@lily.ezo.net> In-Reply-To: <000501bdfdde$1f5f53b0$ef2376cc@tarn.atvideo.com>
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Just did it. Very simple to implement NAT (natd) and use the redirect-port capability: natd - interface ed0 redirect_port other_host:smtp smtp \ -redirect_port other_host:pop3 pop3 All your other reserved addresses will be translated per usual. Works like a charm with MS Exchange. Jim Flowers <jflowers@ezo.net> #4 ISP on C|NET, #1 in Ohio On Thu, 22 Oct 1998, Chad Thunberg wrote: > I am setting up a firewall and enabled natd but have an internal mail > server. Is there a way to still be able to access the internal mail server > from the outside for sending and receiving email? I thought about giving > the firewall a vhost of mail.host.com and diverting packets that came in > from 110 and 25 to the internal mail server but from the man pages, divert > seems to be used for diverting packets from one port to another on the same > machine instead of diverting them to a new or ineternal ip. Any help on the > subject would be great. I would rather not put the mail server outside of > the firewall. good idea, although on a perimeter network with a good wrapper is even better. > > Thanks, > -Chad > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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