I often log in to my office Mac from home to get files and sometimes to control the office computer via Screen Sharing. My Macs are both registered with mobileme and thus show up in Finder. I normally click the icons in the Finder sidebar, click Screen Sharing and go on about my business. This is done using Back to My Mac settings.
Suddenly, I can no longer do this. When I attempt to connect Screen Sharing, the modal tosses the spinner like it's trying connect. That modal sticks that way forever. It will remain in front of all other windows. Even if I quit Screen Sharing. I have to either reboot OR open Activity Monitor and quit the NetAuth process.
I can access the file system all day long and move files around. But Screen Sharing has ceased to function.
I have tossed screen sharing plist files. I have reset file sharing, screen sharing, remote access, approved users. Nothing solves this issue.
Both computers are running Snow Leopard 10.6.8
A 443 BTMM port is set to forward to the target computer.