Using NIS2009\2010 without a hardware firewall

I run NIS2009 (and will be upgrading to 2010) with a Linksys router. I need to remove the Linksys for several months. How concerned should I be while connected directly to the ISP's cable modem? I also run PeerGuardian 2.0 (alIthough I do not file share). I'm running XP Media SP3. Thanks!

 

Sorry, one more thing... This may apply either to my desktop running XP or my Laptop running Vista. Thanks again!

Message Edited by Adam2009 on 10-11-2009 12:16 PM
Message Edited by Adam2009 on 10-11-2009 12:22 PM
Message Edited by Adam2009 on 10-11-2009 12:25 PM