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Date: Thu, 12 May 2005 21:50:34 +0400
From: "Andrew P." <infofarmer@gmail.com>
To: Carlos Alloatti <calloatti@gmail.com>
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cc: questions@freebsd.org
Subject: Re: Redirect *:port to ip:port on the same machine?
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On 5/12/05, Carlos Alloatti <calloatti@gmail.com> wrote:
> On 5/11/05, Andrew P. <infofarmer@gmail.com> wrote:
> > Hello!
> >
> > I have a program that binds to ip:port. What are
> > my options, if I want it to listen on all interfaces
> > (*:port)? Let's say reconfiguring the program
> > and/or running one instance per interface is
> > not possible. I've got ipfw as a firewall.
> >
> > Thanks!
>=20
> How about using a port forwarder or port mapper.
>=20
> I think you could use ipfw and natd for it, with a divert rule, found thi=
s:
>=20
> <quote>
> > If I want to have a port mapping on the same interface, can I do that ?
>=20
> > 127.0.0.1: 8890 -> 127.0.0.: 25 ?
> > If I want to do so, what is natd command ?
> > natd -redirect_port 127.0.0.1:8890 25?
>=20
> ------------------------------=AD------------------------------=AD-------=
---------
> ----
> #!/bin/sh
>=20
> outip=3D"my ip address which will be redirected"
> server=3D"ip address redirect to"
>=20
> # for request redirect
> ipfw add 1000 divert 8888 tcp from any to ${outip} 8890 via cx0
> ipfw add 2000 divert 8888 ip from ${server} to any via cx0
>=20
> #run natd
> natd -p 8888 -n cx0 -redirect_port tcp ${server}:25 8890
> ipfw add 2500 allow tcp from any to ${server} 25 via any
>=20
> </quote>
>=20
> but how about this:
>=20
> http://www.taronga.com/plugdaemon/
> http://www.freebsd.org/cgi/url.cgi?ports/net/jumpgate/pkg-descr
>=20
> the port mapper will bind to *:port2 and forward to ip:port1

Yeah, thanks, I think that's just what I need!

Best wishes,
Andrew P.