Date: Mon, 22 Feb 2016 23:07:48 -0800 From: Julian Elischer <julian@freebsd.org> To: Gary Corcoran <gcorcoran@rcn.com>, freebsd-net@freebsd.org Subject: Re: gateway machine port redirect question Message-ID: <56CC0544.8040002@freebsd.org> In-Reply-To: <56CA5AC4.8070502@rcn.com> References: <43887.128.135.52.6.1456021321.squirrel@cosmo.uchicago.edu> <56CA5AC4.8070502@rcn.com>
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On 21/02/2016 4:48 PM, Gary Corcoran wrote: > On 2/20/2016 9:22 PM, Valeri Galtsev wrote: >> Dear Experts, >> >> I'm one of Linux refugees who several years ago migrated majority of >> servers from Linux to FreeBSD and is happy since. When recently I >> needed >> to set up gateway (Firewall + NAT) machine, I set up FreeBSD 10.2 >> on it, >> used ipwf and natd, and all works well, machines behind gateway on >> LAN can >> happily reach real network. I hit one snag later though: When I >> tried to >> redirect TCP traffic on some port to machine on internal private >> network >> behind gateway, whatever I do doesn't work. >> >> Could somebody point to simple example (it doesn't matter which >> components >> are involved, I don't feel married to ipfw and natd) for FreeBSD >> 10.2 that >> makes the machine gateway, and one of the ports of traffic coming from >> public network is redirected to machine on private network behind >> gateway. >> Something I can reproduce that works, which I then will gradually >> convert >> into what I need. Other way around: adding redirection to already >> working >> (and a bit sophisticated) gateway I set up appears to be beyond my >> mental >> abilities: a couple of weeks of frustration confirm it to me. >> >> I really do not want to go back to Linux to do this, even though I >> feel I >> can do it based on Linux in a course of an hour or two - I've set >> up a few >> of them in the past using Linux, that's the longest it took me in my >> recollection. >> >> Thanks in advance for all your answers and pointers! >> >> Valeri >> >> ++++++++++++++++++++++++++++++++++++++++ >> Valeri Galtsev >> Sr System Administrator >> Department of Astronomy and Astrophysics >> Kavli Institute for Cosmological Physics >> University of Chicago >> Phone: 773-702-4247 >> ++++++++++++++++++++++++++++++++++++++++ >> _______________________________________________ >> freebsd-net@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-net >> To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >> > Something like this? It redirects external port 1234 to a machine > on the internal > network at port 80. In your natd.conf, put something like this: > redirect_port tcp 10.12.34.56:80 1234 yes but he wants this to be activated for sessions from the inside too, from hosts thinking that they are accessing some external host, (maybe for testing?) > > Gary > > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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