[DoctorOhh]

This is strictly informational. I often run a VPN from the same computer in which calibre resides. This VPN creates an unidentified public network to go along with my private network. Since, for all practical purposes, the VPN bypasses the router's firewall this makes sense.

Needless to say when I attempted to connect to calibre from CC it failed. This happens even though I am not using the VPN when trying to connect. The quick workaround for me is to simply turn off the public firewall (its not needed when not connected through the VPN). Connect to calibre via CC, do my business, disconnect from calibre and turn the public firewall back on.

Fortunately the public firewall doesn't affect anything else on my local network. Just thought this info might help someone else sort through a connection issue they might be having.