Forcing usage rules in public wireless LANs

With rapid increase of popularity of wireless LANs a necessity of forcing usage rules arises. This paper describes how to force users to follow usage rules in public wireless LANs. Problems discussed in the work are methods of revealing rogue DHCP servers and users using their own IP addresses, which are not issued by official DHCP server. Every method considers also stopping such users front violating the usage rules. The proposed solutions are custom made for the test network, but general ideas are applicable in any wireless or wired environment.