Fix Vpn Error 691 On Windows 7 8 And 10
The Error 691 occurs when the settings are incorrect on one of the devices (client or the server) and it cannot ensure authenticity of the connection. The most common cause is an incorrect username or password, it may also be the case if you are using a Public VPN and your access has been revoked, you’re attempting to login to the VPN with a domain that isn’t allowed, or domains are not allowed at all, OR the security protocols needed for the handshake do not match....