Is the firewall built in to this modem/router really necessary? I ask because in order to use VPN on my laptop (wireless) I must first turn the firewall off to connect to the office. I also need to turn the firewall off to play a game on my PC (wired). I have been to Port Forward.com and followed instructions there with no success. Since I always have to restart the modem/router to disable the firewall, I'm thinking about just leaving it off. My manual says when the firewall is off, it revertes to NAT (whatever that is). I also use ZoneAlarm on my PC, and McAfee on the laptop (laptop provided by work, no options to change anything there). If I leave the firewall disabled, am I leaving myself at risk for attack?
Thanks for reading.