It is a fine KB article and Im confident it does help the vast majority of issues. It just doesnt even mention the possibility of anything else or what to do to seek further help.
I went to stardock's site and there is no chat support, no phone support, and even no email.
In the past, when I have reached out to communities, 90% of my questions never get a reply and there is nothing I can do to seek vendor assistance.
If your policy is for customers to seek help on the forum and have the moderators forward them as appropriate to the vendor's support team. then thats fine. Its just that there is no mention of this policy anywhere, and I dont have any other vendors that do this so I had no idea this was even possible.
Anyway, heres the info you requested and why I dont think its fw related.
Primary and secondary are both static IP addressed and I connect by IP (removes host resolution issues). I dont need/have VPN installed
Doing a netstat -ano on the secondary shows that port 30564. 30565 and 30569 open and in listening state. I even confirmed this by telneting to the ports from my primary. No problem at all.
Port 30567 is not in listening state and I presume thats because I didnt choose to get remote audio.
Given all other listed ports are open, I am fairly comfortable with this not being a fw issue.
Now I have had symptoms long before I finally lost complete access.
Daily I would get the following intermittant issues:
1) Connect 5 times fine. 6th time no keyboard but mouse moves. All further connection attempts have no keyboard
resolution: remote console in and then logout. Now remote keyboard works again
2) When keyboard fails, so does pressing ctl-alt-del button on title bar
resolution: same as #1
3) Get Win 10 notifications on primary occasionally from multiplicity saying something about authentication. It goes away too fast to read. However there is no impact other than nuisance
4) When I get #1/#2, remoting in and restarting the multiplicity service doesnt help. Usually it required a logout or reboot. However for the past 2 weeks I cant get keyboard to work ever.
At this point I uninstalled both primary / secondary and reinstalled. No difference
I guess it could in theory be bug in the latest version. While I always had flaky connections over the past few years shortly after upgrading to the latest version I had complete keyboard loss. I cant say that the two are tied. I dont remember it happening immediately after the upgrade.
I am a device driver engineer that wrote the entire TCPIP stack for OS/2 Warp back and for Novell Netware back in the day. I feel comfortable following any steps you suggest. I have wireshark already loaded. If you want a trace, I can send it. Just tell me what port the keyboard uses.
Thanks for any help