Some time ago, on this forum I read how if @ hotel or anywhere using a public wifi connection you should have a firewall that protects you against ARP poisoning. I can be wrong. HOW ABOUT, when you connect to the internet via (bluetooth or USB) using your cellular EVDO, HSPAA or 1x?? 1. On comodo and like any other network that it detects I check being able to be discoverable, which I think is a mistake on my part since I use vpn software (hamachi &/or easyvpn) while away from my home network. 2. Another mistake I think I made is On vista, the network I choose it to be "private" when considering the former I think I should change it to "public",,, 3. Allot of people are proponents of SPI, but when your accessing the internet from a pda's internet connection I imagine the risk goes up, how can you mitiage it? Any comments on my hunches or any suggestions?