VPN server access stopped working for inbound clients

J

JohnLenz

Server2012R2 current build

Client role VPN in Remote Access Management This function was working but no longer can remote clients (Windows10 Pro 1909) connect.

I verified that the external IP address to the sever is correct.


Microsoft firewall

Remote Access Management Console shows operational status all Green

Windows 10 error message is: The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.


I checked the router and all security related ports are forwared to the VPN server internal IP address.


Where do I start to find out what is wrong and correct it.




John Lenz

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