(Not sure where to place this thread, so mods please move as needed) I have a Macbook that I do everything on (i.e., personal finances, emails, etc.) I also have one of the rudest, most obnoxious / nosey housemates you can imagine, who loves to boast about how he can sniff packets and hack networks. And yes, from time to time he'll talk about hacking into my computer (or trying to at least). The guy is a complete loser, but the housing situation cannot change at the moment, so I'm asking help from you guys about how I can protect my MacBook's wifi from the creep. The evidence: - Under OS X, no intrusions noted. - Under XP, ZoneAlarm keeps popping up with attempted intrusions coming from the home network. The setup: - Macbook C2D connected via WEP 128-bit encrypted wifi. - Linksys wireless router with 4-port hub. - Mac Pro connected via Ethernet on the hub. - Creep's notebook connected via wifi. - Creep's desktop connected via ethernet. More info: - I own the router, and only I have access into the router setup. Question: What can I do to protect my Macbook from the Creep? I know this isn't the Mac Pro forum, but if you have any advice to help with the Mac Pro (connected via Ethernet), that's much appreciated as well. If your advice is that this is too complicated to explain in this forum, that's cool too. Point me towards where I can learn and I'll do the hard work needed.