Question about IPSEC VPN Tunnel

Hello,

I am reaching out to the experts in this community because I am at my wits’ end.

The setup is as follows: we have installed a UXG Pro to replace a FortiGate with various VLANs. There is also an IPSEC VPN Tunnel to another site with a FortiGate. The IPSEC VPN Tunnel is online and pinging from Unifi to FortiGate works without any problems, but the reverse does not, even though all routes in the FortiGate remain the same. Pinging from the FortiGate CLI to the default gateway IP of the Unifi does not work. The intention is that one VLAN should be accessible from the FortiGate over the IPSEC via the Unifi. For this, static routes will be needed, but the basics are already not working…

Hopefully, someone has suggestions or can point me in the right direction.

Thank you.