IPSec VPN Tunnel Between Fortinet FortiGate and Cisco Meraki MX - Configuration and Troubleshooting

In this video, Marcellus and I go through configuring a site to site IKEv1 IPSec VPN tunnel between a FortiGate (firmware version 7.2.5) and a MX (Firmware 18.107.2). In this example, both Firewalls are behind NAT devices so some configurations may be different depending on your specific environment. We cover configurations within Meraki dashboard and FortiGate GUI mgmt interface, configuring firewall policies for IPSec tunnels, adding static routes, and extensively cover troubleshooting a tunnel not establishing connection. We finish up by going over the specific configurations we use on both sides of the connection.

In this video we do cover a lot of little tidbits that aren't well known, such as Non Meraki peer monitor in Meraki dashboard only monitors if phase 1 is up for a tunnel which can be misleading. We showed how to verify a tunnel is up and some differences between MX firmware versions and things to try if your tunnel is not coming up.

As always leave a comment if you need liked the video or seek assistance!