I recently purchased the sb6121 modem thinking I could use it with my comcast business static ip setup but have since learned otherwise. I'm now considering just switching to a dynamic IP so I can use the modem.
My question is whether the modem provides any kind of firewalling features or if it's purely a modem and I still need to have a router/firewall behind it? The documentation is less than clear as to its capabilities.
Thanks!