TeamViewer: protocol negotiation failed
Protocol negotiation failed. Please try again
After scouring the internet, I have not had any luck in finding what causes this issue.
I have tried so far the following:
- restart teamviewer
- enabled windows logon for all users (This popped up in a few posts I have read)
- Re-installed + updated TeamViewer
Has anyone came across this issue before? What is the cause of this message?
Solution 1:
Just solved this issue. In firewall, I disabled NIPS protection (low and middle severity). From that time, connecting without any problem.
Solution 2:
I've seen this happening when the two computers are using different versions, but recently I believe Comcast/Xfinity made a change either on the network-side of things, or pushed out updates to their cable modems, which caused this problem.
I and others have been able to solve it on Windows PC's by disabling the IPV6 Protocol under Control Panel > Network > Network Adapter Settings > Right Click on your network adapter and uncheck to disable the IPV6 protocol. This fixed my problem immediately.