Scenario: Users are able to establish a VPN connection to the Fortigate firewall, but are unable to authenticate.
Troubleshooting steps:
- Verify that the correct authentication method is configured for the VPN connection by running the command “diagnose vpn authserver list”
- Check the system logs for any error messages related to authentication by running the command “diagnose system event list”
- Make sure that the correct users and groups have been added to the VPN configuration by running the command “diagnose vpn user list”
- If the problem persists, try clearing the authentication cache by running the command “execute vpn clear”
Multiple Choice Question to check your knowledge.
Q1. What command can be used to verify the correct authentication method is configured for the VPN connection?
a) diagnose vpn authserver list
b) diagnose vpn session list
c) diagnose vpn user list
d) diagnose sys vd list
Q2. Which command can be used to clear the authentication cache?
a) diagnose sys user list
b) execute vpn clear
c) diagnose firewall policy list
d) diagnose sys config-history list