Hi there, my solution was to prevent basic authentication on the firewall, most free download managers does not support NTLM authentication so this prevents them downloading through the isa2k4. Or You should use the firewall client to specify wich application i allowed to access external networks. > i'm using isa server 2004 to mange my local network and i want to limit or > prvevt download using ( flashget , dab ... etc ) all download acclerate > programe from client of my lan > > all client using scuir nat client > > thank you