To enable firewall logging open Configuration | Traffic policy page in Kerio Administration Console and enable Log matching connections option for any allow-rule that you want to analyze.
If ProxyInspector and WinRoute are installed on the same computer, no other settings are required. If they are installed on different computers within your LAN, please select the menu item and click on the tab:
It is important to choose right WinRoute version because starting from version 4.2 WinRoute stores settings in a different registry key.
It is important to define local networks addresses and local computer names on the corresponding tabs. Without this ProxyInspector will not be able to detect which IP addresses are local or not.