I've said this before so some may remember but Blockland is really low on system requirements when it comes to running the server. I ran a Speedkart server with 3-4 people on a system with a Pentium 4 1.6ghz, 240mb of system memory, and I used the OS CentOS. The server ran flawlessly, I would get the "LAG" icon when the round would restart and maps would change (which is mormal IMO) but racing was flawless and didnt lag one bit. So basically, if your specs are better than that you will be fine lol. HOWEVER, upload speed is also a biggy when running a server for any game (I have about 20mbps)