I have noticed a lot of port scans originating from China. My firewall and such have stopped them, however the sheer amount of attempts concerns me. Should I even be concerned with this? I read on how to block China's IP range, however I do not run any form of server (Apache, IIS or anything of the like). I did read that if you run a linux router you can use IP tables to block IP ranges. Has anyone tried blocking different ranges via a linux router?