How to Troubleshooting Fortigate VPN Routing Issues: A Step-by-Step Guide”

Scenario: Users are able to establish a VPN connection to the Fortigate firewall, but are unable to access network resources.

Troubleshooting steps:

• Check the routing table for the VPN interface by running the command “diagnose ip route list [interface name]”
• Verify that the correct security policies are in place for the VPN connection by running the command “diagnose firewall policy list”
• Make sure that the VPN connection is being passed through the correct virtual IP (VIP) by running the command “diagnose vpn vip list”
• Check the system logs for any error messages related to routing by running the command “diagnose system event list”
• If the problem persists, try resetting the VPN connection by running the command “execute vpn clear”

Multiple Choice Question to check your knowledge.

Q1. What command can be used to check the routing table for the VPN interface?

a) diagnose ip route list [interface name]

b) diagnose vpn tunnel list

c) diagnose firewall policy list

d) diagnose vpn vip list

Q2. Which command can be used to reset the VPN connection?

a) execute reboot

b) diagnose sys config-file-check

c) diagnose vpn session list

d) execute vpn clear