How to Troubleshooting Fortigate VPN Performance Issues.

Scenario : Users are reporting slow performance when accessing network resources over the VPN connection.

Troubleshooting steps:

• Check the current VPN session count by running the command “diagnose vpn session list”
• Verify that the VPN is not reaching its maximum connection limit by running the command “diagnose vpn tunnel list”
• Check the current CPU and memory usage on the Fortigate firewall by running the command “diagnose sys top”
• Check for any errors or drops on the VPN interface by running the command “diagnose sys interface list”
• Try to Identify the traffic that is passing through the VPN, by running the command “diagnose firewall policy list”
• If the problem persists, try adjusting the VPN configuration settings to optimize performance, such as adjusting the encryption algorithm or enabling compression.

Multiple Choice Question to check your knowledge.

Q1. What command can be used to check the current VPN session count?

a) diagnose vpn session list

b) diagnose firewall policy list

c) diagnose sys top

d) diagnose sys interface list

Q2. What command can be used to identify the traffic that is passing through the VPN?

a) diagnose firewall policy list

b) diagnose vpn ike config

c) diagnose vpn authserver list

d) diagnose vpn tunnel list