Inget att oroa sig för, sånt händer när man besöker vissa servrar. Här kommer ZoneAlarm Pro´s info:
This message can happen in one of two cases:
1. If the source computer looks like a server you've recently visited, that server didn't disconnect properly from your computer, and is checking the connection again. You can safely ignore this message, because the server will eventually realize you're disconnected.
2. If the source computer is one you've never seen, it may be trying to connect to a service on your computer, or is scanning to see if the service exists on your computer.