On Wednesday 25 November 2009 13:57, Boris Epstein wrote:
Happy Thanksgiving!
Same to you too.
Does anybody know if there is a convenient utility to configure iptables on a CentOS 5.4 or 5.3 machine to do port forwarding? And if not, where and how does one put the requisite commands?
I do all my iptables configuring from the command line. iptables config is store in /etc/sysconfig/iptables. This Tutorial for iptables should be able to help you.
http://www.zoominternet.net/~lazydog/iptables-tutorial.html
Port forwarding is really not that hard. The big question is if the forwarding to another port is on the same box or will you be forwarding it onto another box? If it is staying local then you want to look at REDIRECT not forwarding. I.e.,
iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080
If you are truly going to forward it onto another box then you need to look at DNAT.