I manage an open wireless network for our computer club. We have about 10 PCs and 3 mornings a week we get about 40 laptop users in to use the network. The problem is that recently all users have been losing their wireless connections which seems to coincide with the appearance of an Ad hoc SSID which keeps changing its MAC address and has a very strong signal. We have tried ensuring that all users are set up for infrastructure only. From the signal strength the AP(s) must be quite close but I dont know if there is some malware that has spread to one or more PCs or if it is a user outside the building. Can anyone advise the best course of action?
