I feel *safe enough* without a firewall because I use SSM plus a router. So I do not want to use a software firewall. My connection is broadband cable. I would like a simple software that can temporarily LOCK OUT all internet traffic without me having to break my connection or turn-off my router. I do not want a full-fledged firewall -- just a simple program that will let me lock-out the internet for brief periods, from time to time. Does such a software exist? If so, please let me know.