I have Comodo as my firewall. When I'm online there are typically outgoing connections, but no incoming connections.
However yesterday for the first time (though I admit I don't look very often) there were a few incoming connections. They were connected to "System". But Comodo apparently couldn't show a filepath for System, like it does for Chrome, svchost.exe or Internet Explorer.
What are this "System2 and its incoming connections? Are they anything to be concerned about?