I have two PC's that connect to a Linksys WRT54G router. One of the PC's was online and I think it got hacked. The hacker got in through the wireless connection in the router. I removed all PC's from connecting to the router and what I found is that the internet light flashes for traffic. Is this just standard internet traffic or is someone using the router? Is there anyway I can tell any IP addresses using the router? Is DHCP more secure than static? The safety measures I took was to enable the "Wireless MAC filter", which won't get me very far. Tomorrow I'm going to look at using WPA but I just wondered if anyone had any suggestions? Thanks.