My friends and I keep getting together for LAN parties. We meet at different locations, with different routers and different internet connections each time. The two most common routers are a single Actiontec MI424WR (with no Internet connection available), and a triple-link of a central Netgear GS605, with another Netgear GS605 and a D-Link (unknown serial) connected behind it. There may be a fourth router, going between the central Netgear and the rest of the house and the outside cable connection. We end up having to fully shut down all of our firewalls (which is bad news at the second location, as it remains on the Internet) to connect to our servers. Our servers are purely LAN-based, namely we use one of our own computers. We also find that only about half of the computers can see each other via file browsing over the network, the others cannot see them. Can anybody help out at all? I'm fairly new to networking, about the extent of my knowledge is Command Prompt's ipconfig and 192.168.#.1. Thanks in advance.