I am currently hosting the computer of my friend because I have a really good internet connection and we use it as a server (Minecraft, Teamspeak, web, SSH,etc.). The server is running Ubuntu and my friend, that has and need the total control of it (via SSH and TeamViewer), already tried to brute force my router password (with Hydra) and to sniff my VLAN (with Ettercap using ARP protocol). By the way, the sniffing worked because he told me my main password the next morning! Now, I am really affraid about what he can do, but I want to keep the server (too much fun). So, is there a way to isolate the server to block his access to the VLAN (local network)? By the way, I have a 3COM SuperStack III 3300XM switch and it is a managed one. I already tried to create another VLAN but it did not seems to work (no internet). Any ideas? Thanks!
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4/3/13 at 9:18pm