Hello all, Please excuse my ignorance of networking/security. These questions are probably pretty basic, but the only way to learn is to ask, right? I have thoroughly Google'd the web and can't find any relevent answers to my questions. I'm using a port filter (NOT LnS) on my webserver. I have all incoming connections on all ports except for ports 80 and 443 blocked. My problem is is that I can't use Internet explorer from the server to connect to a remote website. Using a port monitor tool, I was able to figure out that Internet Explorer (when connecting to a webserver) attempts to open several local ports (usually in the range of about 1300-1600)...I am assuming then, that you must have a local port(s) open to recieve the data that is being transmitted from the port 80 of the remote webserver. However, I don't know which ports to open as the port numbers that Internet Explorer chooses appear to be somewhat random. Can someone please explain this to me? In addition, I have the webserver configured for to automatically download and install critical updates. I am assuming it probably does this via HTTP, and that the above situation will also prevent my server from downloading automatic updates, correct? Any info would be most appreciated!