On Thu, Jan 3, 2013 at 3:37 AM, Jorge Fábregas wrote:

> Ok, I've posted a similar setup I've used in the past that worked like a
> charm.  The script is the actual /etc/sysconfig/iptables.  You'll notice
> the syntax there is somehow different than when you manually create the
> rules (or put in a script) but you get the idea.  Those rules WERE THE
> MINIMUM required in order to let a machine on internet reach a machine
> on the internal network (port 8,555).   Ask me any question if you don't
> understand a line (please specify line number in question).
>
> eth0 is WAN, eth1 is LAN.  Notice how I use "-i" and "-o" for the NICs.
>
> http://fpaste.org/sdPF/
>

Just to follow up on this, I had nothing but trouble from the portal
server. Everything I did seemed to break unrelated stuff and none of it
made any sense. It was very frustrating, and that was really why I came
here to ask.

Anyway, I finally gave up. To save time and what was left of my sanity, I
just installed another server parallel to portal, implemented rules based
on your example above, and called it a day. The new server *only* handles
the masqueraded connections to the internal server.

Thanks for the tips!

-Alan
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