We have an AirPort Extreme and would like to be able to use it to do the Network Address Translation so that we can utilize the guest network function of our AirPort Extreme. How do we disable the NAT service on our modem?
Welcome Ply. As you do not have a static IP there are no changes necessary on the Comcast Gateway. You could change the IP scope for the guest network and/or limit the range of IP's used for the guest network on the Airport Extreme.