If you forced your customers use 802.1X for authentication they wouldn't get an IP address unless they were authorized. If 802.1X is not in the mix, another solution is to give them a very short lease (say 2 minutes) until they've completed web-based authentication, and then give them the one-hour lease. Any portal-based product for wireless hotspots can help you out here. Frank -----Original Message----- From: Frank Bulk Sent: Wednesday, February 14, 2007 5:40 PM To: nanog@merit.edu Subject: Wireless Network Question Hello- I'm looking for anyone that can send me some suggestions based on experience with a wireless network. My problem: It is possible with our current wireless network that a situation could arise where the IP address pool for a specific service location could be exhausted due to Windows clients acquiring an IP address without being authenticated. Thus, if we have a large event taking place in-market, the IP addresses would be assigned and reassigned out (on a one-hour lease) to each Windows client connected to the network, possibly quickly exhausting a small IP address pool if enough clients were simultaneously up and connected. Does anyone have a good suggestion on how to avoid this from happening (aside from over assigning and wasting IP addresses or ignoring the problem)? Thank you for your time MArla Azinger Frontier Communications