I've been having problems with my cable internet lately where it'll work fine for a day or so and then without me changing anything I won't be able access the internet and then it'll start working again ... I'm 99% sure that it has nothing to do with my config. Ths cable company assures me that there isn't any work going on in the area but it seems to be happening during the day. The question being is there a simple tool software/hardware to test signal from your cable provider? So at least I can isolate it to them? When the cable dude came he attached a machine which tested the voltage I think?