Date: Fri, 21 Sep 2001 21:18:30 -0500 From: "SNF" <snf_lists@yahoo.com> To: <cjclark@alum.mit.edu> Cc: "Freebsd-Questions" <freebsd-questions@FreeBSD.ORG> Subject: RE: IPFW/NATD - forward all port 25, 110, 143 connections to an internal 10 series server Message-ID: <LOBBKFILCMGGNDCBBCELCENOECAA.snf_lists@yahoo.com> In-Reply-To: <20010921160051.E980@blossom.cjclark.org>
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<snip> > > set up in a rule.) Or, is this something that would be more > appropriately > > done using a different type of rule? I will eventually want to > do the same > > thing with a web server or two... > > The 'fwd' rules do not work how you expect. ipfw(8) does not change > the contents of the packet. You want to do natd(8) 'redirect_port' > within natd(8). > -- > Crist J. Clark cjclark@alum.mit.edu <end> I guess I am still not clear on how I am to implement this. I have a firewall set up on the server, but at the same time I am allowing divert(8) to divert all connections from inside the network through the single outside interface using the following instruction in my ipfw commands: ${fwcmd} add divert natd all from any to any via ${natd_interface} (I guess the best way to explain how I have things set up is to see the way that Dan O'Connor has things described at http://www.mostgraveconcern.com/freebsd/ipfw.html) I then have a script for natd (called natd.conf which is called in rc.conf through the following line: natd_flags="-f /etc/natd.conf" # Additional flags for natd) That script contains the following: # natd.conf use_sockets yes same_ports yes and that is it. If I understand you correctly, everything is already set up correctly and I simply need to add more to the natd.conf file - like: redirect_port tcp 10.10.20.40:pop3 pop3 redirect_port tcp 10.10.20.40:imap imap redirect_port tcp 10.10.20.40:smtp smtp Would this then handle the response that 10.10.20.40 gives to the client? Or, does natd "know" to send the response to the client making the request? And, if I am understanding correctly, this would only affect incoming connections to 24.159.225.186 pop3/smtp/imap? I hope this question is somewhat clear... I've had difficulty condensing it. Thanks, SF _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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