My firewall keeps getting hammered with people all over Asia trying to find an open port. Is this normal, should i be concerned? Regardless if it is normal or not is there anything I can do to try and prevent this from happening? It feels like I'm in that movie 13 ghosts. I can see the scary ghosts behind the glass but I just fear them breaking out. The three IP's I checked from the source have been in Korea, China and Taiwan so far.