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VPN Connection fails due to authentication failure. Symptom: Starting and logging in to the ProtonVPN Windows client work fine, however, when connecting to a server, the connection fails. The Windows application logs indicate “Auth Fail” Hello Radenko, that is probably because the application tried to reconnect for some time and failed Cisco VPN Authention : Reason - 413 Solutions | Experts Oct 19, 2011 NoMachine Forums - "Authentication failed" connecting to Mar 12, 2019

Feb 25, 2020

Oct 19, 2011 NoMachine Forums - "Authentication failed" connecting to Mar 12, 2019 Windows Authentication behaves oddly when VPN'd

May 22, 2020

Cisco VPN Authention : Reason - 413 Solutions | Experts Oct 19, 2011 NoMachine Forums - "Authentication failed" connecting to Mar 12, 2019 Windows Authentication behaves oddly when VPN'd The VPN software prompts for credentials which queries against Active Directory to ensure username/password are correct and the user has rights to logon via VPN. But a successful authentication only establishes a connection to the network. Access to network resources relies on the authentication you provided to the workstation when you logged on.