Basically this will slow down the whole thing - so if you block it it will loose speed because its trying. On OS X I will test it what it actually does (its easier than in windows) - but I have other things to do at the moment. This was just an observation I made after installing SR4 which made me nervous. I am fed up with keeping a network going and having all this trouble again and again. Stuff like this should be made explicit by the software manufacturer. Otherwise it just binds resources. Ever had a french hardcore server on one of your machines ? Mungo