I have install the windows 2000 server (updated with SPK4) and the ISA Server 2000. The ISA was install to the PC as a stand alone server. All clients have access to internet and they surf as a web proxy clients. The problem have appeared when they try to use programs which required especific open ports(like the camera with yahoo messanger 5100 inbound and outbound). I created the protocols, applied them and restat the Wproxy service but the applications wich use that created protocols still not working. I haven't set restrictions (there is no site or content restriction) and remember that the user can surf. What could i be missing?