Hi all, We have an isa server 2004 installed on one network adapter, connected to two routers that are secured by a pix firewall, we are receiving a 504 proxy timeout error message on some https websites when connecting from the clients, but if we connect directly from a client machine behind the pix ((not from ISA) we could connect without any problem. The client machines are web proxy clients Any ideas. Thanks Samer Awad System Administrator Senior System Engineer IT Facilities Management Team Mobile : + 961 3 690827 Office : + 961 3 792076 E-mail:S.awad@xxxxxxxxxx