I have a D-Link router and I was notified by a program stating that an intruder was detected on my network. The IP was a private IP from inside my network, so I guess what I am asking is, is it possible that a neighbor has connected to my wireless access point? If so, I have read that WEP and WPA protection is weak, but should I still invoke either to prevent further connections? I tried to use NMAP, but it stated that the ip was disconnected.
Thanks in advance.