[ale] port forwarding help
Chris Ricker
kaboom at gatech.edu
Thu Apr 3 15:42:28 EST 2003
On Thu, 3 Apr 2003, Michael D. Hirsch wrote:
> This seems simple, but I've been thumping my head against if for a while
> now. All I want to do is forward anything to port xx to machine y.y.y.y.
>
> From reading docs it looks like all I need this:
>
> iptables -t nat -A PREROUTING -p tcp --dport xx -j DNAT --to y.y.y.y:xx
that's fine
> I have made sure that port forwarding is turned on.
>
> I test by telnetting to port xx on the forwarding box, but never get a
> connection.
>
> One other possible complication, do I need to worry that I have only 1 nic
> card? So on my test box all the traffic is really on one network. In
> production, of course, I will use multiple network cards.
bring up a virtual interface and forward it (rather than the IP you've
configured on the real interface)
that still might not work, but it's more likely to ;-)
later,
chris
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