Hi all
When I us Xp at home I always run the black ice and it all the time notifies me that I’m under attack and shows the attacker IP so I can block it
Is there any similar software for Linux? Or do I need to modify the fire wall? And how?
RGD

I don't see why you need such a software for Linux if you are properly using Netfilter/IPTables (which is included in the kernel itself). It's a firewall in simple terms and you know the rest. You don't have to manually block attackers.

Anyway if you still prefer alerts you might want to install an IDS like Snort, may be with a supporting GUI frontend too.

EDIT: If you want help on IPTables, you can post here (LQ.org) about it (if you thikn it's unanswered in earlier LQ posts)

There may be a "ready" piece of software for this, search if you like. I find two ways (at least) of doing this: one way is to have iptables log the traffic, or part of it, that is coming and then have some program scan trough that (real-time) log information and try to identify "attacks", and then do something about it. Another way is to have a program listen to the traffic all the time (like tcpdump) and scan that output. There surely is some software available, at least to do stuff like ignore traffic that seems hostile. Google, Altavista and other search engines help you out.

Thank you guys!
Iptable who to run it from FC6? it will effect other chat program like messenger and skype?

thanks again

You already have IPTables active in FC6. You just have to give the rules you need. Luckily FC6 have a simple tool to edit firewall settings easily.

Go to menu System --> Administration --> Security Level & Firewall.

Set firewall enabled, and specify things you do not want to block. Some programs might need have non-filtered ports. If to enter them too (in other ports section). This is the easy way. Otherwise install a program like FireStarter. It'll be more flexible. But if you want total control, command line tool is the best.