This how-to will explain how to use LDAP authentication to Microsoft Active Directory with an IPSEC VPN to a Fortinet device. I’ve tested it with a Fortigate 60B and a Fortigate 100A with success. This post assume you have a fully function VPN IPSEC configuration on your fortinet device with authentication based on a Fortigate group. Connect to your device with SSH (or as you prefer, even with t..