I have people over who need temporary access to my network. Generally it's my son's friends who want to game on it with him. This would be via wireless. We do have a mini server running for backup of files, and my computers all are set up through it, be we do not restrict domain access via the server. Yesterday I just entered our network password onto a friends computer so he could log in, but then when he left, he still has our profile in his computer so I had 2 concerns: 1) can he somehow reverse lookup the password I entered and know it? 2) obviously if he is within range, he has access to our network. What is the best way to handle this? I am using airport extreme units for access, but not the lastest one with dual band for guest access (and as i understand it, guest access would allow internet, but not contact with our own network computers anyway). Ideally I could assign a temporary account which would self disable in a set amount of time and the person would no longer be let on. Or if I could create a different access and password, which I could then replace without having to modify all of OUR computers.