i have a linux-based firewall between my home computer and the internet. i'm paranoid, what can i say and if you can see the intrusion detection logs you would be too. its a jungle out there.
the hard disk of my firewall crashed the day after i got my dsl. it just stopped working. i guess its about time because its more than five years old already. good thing i have an old hard disk lying around so it was easy enough to replace the dead disk and reinstall my firewall. all in all, it took about 30 minutes.