hello, i have the next problem: i install isa server and work for 4 or 5 hours, after doesnt work, the clients dont have access to internet but if i uninstall the isa server and i install isa server again, the clients have access to internet. i have windows 2000 server and service pack 2 for windows 2000. before i had isa server over windows 2000 server and service pack 1 for windows 2000 and i never had this problem, but i dont know. the problem could be the service pack???. thank you Anibal Zaldivar Are you a Yahoo? Turn your email into a secure Online Office 100% Ad free! http://www.norada.com/office