Hi Sling I am not familiar with the GUI in Kerio 4.x You will likely have to go into the advanced section and create a couple of block rules for those IP ranges and place them at the top of the rule set. They would need to be higher in priority than any of your application rules. The rules would need to look like: Action: Block Direction: Both Protocol: TCP and UDP Remote Port: Any Remote Address: (range) 209.66.114.0-209.66.115.255 Local Port: Any Local Address: Any Action: Block Direction: Both Protocol: TCP and UDP Remote Port: Any Remote Address: (range) 81.211.105.0-81.211.105.255 Local Port: Any Local Address: Any Regards, CrazyM