I m suffering a log n my network boz of lots of virues attcking in my network. That way most of the time my network get hang. I wnat to configure a firewall on linux pc. I have redhat Linux ES 4 edition. I dont know exectly how to configure firewall. I want nobody should able to access my network and dont want to allow download .exe, online music and pron site. I also wana restrict abuse or any type of thread to enter into my network. I want to know, if too much broadcasting in my network so how can i control via iptables or else.

Pls help me. if u have any solution so pls mail me at rock_micro2004@yahoo.com


Thank you

Akhil

If nobody can access your network he can not do anything (include downloading) , and then your network is invisible to everyone . Are your sure that you want it .
This is command deny all connections to your system :
iptables -I INPUT -i <your NIC such as eth0> -j DROP .

You can use iptables to do this. Although it's not complicated, you do need to spend some time planning which traffic you want to allow into and out of your network as well as which traffic you want to keep out. I'd recommend doing some reading first - there are plenty of good references around. Places like the netfilter documentation page at http://www.netfilter.org/documentation/index.html and Arno's iptables page at http://rocky.eld.leidenuniv.nl/ are useful.

Please don't ask for email responses - the debate and solution of problems should be here for everyone to see...

Three resources specific to building a good iptables firewall, two are blog entries and one is an article.

1) Apotheon's Blog entries

2) The Article


You may need to sign up for a free membership to view the entries.

A simplier approach for you may be to install IPCop or Red Wall

http://www.redwall-firewall.com/

http://www.ipcop.org/

If you are going to run a full distro as a firewall look at Firestarter. Its a GUI for the iptables

http://www.fs-security.com/