My last replay to this problem, cause is becomin annoyin. U dont need a second hub. U have a spare port. If u plan to buy something buy a router with 8 ports, instead of a new hub. If u buy a hub, buy a switch-hub, but u dont need it at this time, maybe for future use! Put static ip's, so u can limit ur internet connections U need to configure ur server and also ur firewall, unless if u want the viruses to do parties. Good Luck m8, pm if u stuck