FortiGate as an IPv6 DDNS client for FortiGuard DDNS

When configuring the FortiGuard DDNS service as a DDNS server, the server type and address type can be set to IPv6. This allows the FortiGate to connect to FortiGuard over IPv6 and provide the FortiGate's IPv6 interface address for updates.

config system ddns
    edit <name>
        set ddns-server FortiGuardDDNS
        set server-type {ipv4 | ipv6}
        set ddns-domain <name>.fortiddns.com
        set addr-type ipv6 {ipv4 | ipv6}
        set monitor-interface <port>
    next
end

To configure an IPv6 DDNS client with FortiGuard DDNS:

config system ddns
    edit 1
        set ddns-server FortiGuardDDNS
        set server-type ipv6
        set ddns-domain "fgtatest001.fortiddns.com"
        set addr-type ipv6
        set monitor-interface "port1"
    next
end