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I just installed gentoo. I am trying to use guardog as a frontend to iptaples(worked well with slack). It is not working and is locking up my system. So as of now I have no firewall. When I run a scan with nmap, it shows all of my ports closed, even 6000. also when I go to sheilds up, it shows all ports closed, and a few stealthed. Is this pretty insecure, even though all ports are closed? should I be worried about getting this firewall up fast?
Yes, when running cable definetly run a firewall, it will save you lot trouble in the future. I had someone a couple of years ago scanning other computers from mine. Rather a shock when your isp sends you a nasty email threatning to take action if i didn't stop probing other computers. I had done a reformat, it was late so i went to bed forgot to put the firewall on ( i was running under windoze then ) a then a few days later the email arrived, i just put the firewall back on that afternoon.
For windoze I was using Mcafee firewall with anti-virus package, I tried a couple of different ones and Mcafee seem to be the best of the bunch for me.
But i don't have it running on my windoze box anymore, I have a pentium 200 running as a hardened linux box running as a firewall/gateway now. It sits between my cable modem and my 4-port router.