SoftEther VPN User Forum

Hello guys, i tried to connect to Mikrotik SSTP SERVER with SoftEther VPN Client from Win10, but always catch an error like : "Error (Error Code 2): Protocol error occurred. Error was returned from the destination server. " .

I'm not familier with Mikrotik, but the SoftEther client uses he protocol "Ethernet over HTTPS". Does your router support this protocol?

yes, but in my router its called SSTP, anyway , i cant to it with Softheter VPN Client
Error (Error Code 2):
Protocol error occurred. Error was returned from the destination server.

I see. Ok you need to debug this on the server side.

Have a look at the server_log/ files on the server while initiating the connection and see what they say.
Ideally also compile SoftEther with debug like this:
make DEBUG=YES

and attach here the output log

Cheers,
Moataz

VPN over HTTPS which SoftEther VPN client uses is not SSTP.