On 7/15/11, hadi motamedi <motamedi24 at gmail.com> wrote: > Dear All > I need to put my centos 5.6 server as firewall server in fron of a > windows-running node before connecting it to the net. Can you please > let me know what stuff do I need to put on my centos server? > Thank you Hadi; Under most circumstances, CentOS 5.6 should come with the software you need: iptables (and, possibly, iptables-ipv6). There's a wealth of information about configuring iptables on Google. To get you started, this looks like an interesting overview: http://www.centos.org/docs/5/html/Deployment_Guide-en-US/ch-fw.html Also, if you get daring and want to try writing rules for yourself, Mike Harris has a nice template configuration for iptables: http://mharris.ca/iptables/mharris-iptables-example-config-1.2.txt Read up on iptables, understand the concepts behind it. This is a good thing to take slow if you're not familiar with it. Security is not to be rushed. :) Cheers, Cody Jackson