Wireless network equipment offers great flexibility for mobile as well as stationary computers. Clients are no longer bound by the length of a network cable. Instead wireless connectivity increases the clients’ mobility. This paper describes an implementation for wireless clients to access a wired computer network through an efficient authentication mechanism. The imple-mentation is called SuxNet, and is a contribution to IP-login [8] and Institute of Electrical and Electronics Engineers (IEEE) 802.1x [3]. The paper also explains and evaluates different security concepts such as Wired Equivalent Privacy (WEP) and IEEE 802.1x.