Hello, there is an internet application we want to use and i have some clients who needs to connect to it. Firewall is setup so that it can connect to thos ports, proxy server is squid. The internet application is using different ports, my proxy server listens only to port 4480 (http traffic for internet) the users can also go to https sites (which are using port 443 and ftp). The internet application is using different ports (like port 7090 and others), how does it come that my client pc's can't connect via the proxy to those ports ? Is it because they are using a seperate application (i can use a proxy in that application) ? do i need port forwarding ? transparent proxy server ? In squid.conf, there is a parameter "acl blahblah port 80 443 21 20 3389 1025-65536" ==> by example. Does that means that squid can handle the clients who connect to port 7090 of an ip address on internet ? this is not very clear to me, could someone explain please ? thnx, Verus.