Hello,

Any iptables experts out there? I am trying to setup a linux firewall to do simple forwarding to a local web server - my basic config is the following

(internet) -> (cable modem) -> <public addr>(linux firewall)<local address> -> (local LAN) -> <local addr>( WEB server )

Does anyone know of any good examples of setting something like this up? I have used the "Easy Firewall Generator for IPTable" tool and have been working through Robert Zeiglers book "Linux Firewalls 2nd Edition". Any other pointers to iptables resources?

Thanks,

SD

Try the IP Masquerade HOWTO:

http://en.tldp.org/HOWTO/IP-Masquerade-HOWTO/

iptables -t nat -A PREROUTING -p tcp --dport $EXTERNALPORT -j DNAT --to-dest $WEBSERVER:80

where $EXTERNALPORT is the external port you want to reroute to the local host $WEBSERVER

hope this helps

thanks for the feedback - it all helped.

with alot of reading and a great tutorial at www.faqs.org/docs/iptables i was able to get a fw running with both a local private zone and dmz. the above mentioned link has clear easy to follow examples of several different network configurations.

sd