Firewall help

[Wildkard]

I currently run my pc through a wireless network useing a Netgear DG834G router. Now this has built in firewalls already. But also on my pc I run a McAfee firewall. Is this necessary, or are the built in firewalls on the router ok? (I have no idea how to configure them either!)

 

[Wildkard]

Thanks guys...just one more thing..if I do open up ports on the router will I also have to go onto my software firewall and open them up as well?