Really a firewall is only necessary if you have ports open that you would like to close to the outside world (but would like to keep them open for localhost/can't close them). For instance I run cups (a printer daemon) I my computer which opens a port on 651. Its nice to just have it closed off.
I configured my iptables originally with kmyfirewall. The nice thing about kmyfirewall is that makes setting up the firewall relatively easy and it creates a nice shell script that you can edit directly.
Alexander Horn wrote:
So I just googled for /firewall linux/ and I am now as almost as clueless as before because there is so much stuff out there.
Where could I get started on that issue of setting up a good firewall? What do I have to pay attention to in particular?
Thank you a lot. .alex
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