IPSec RemoteVPN - No public WAN interface available, can't use the uplink router's IP also

[vnagula]

Hi Friends,

I have a similar but a little different situation with respect to IPSEC Remote VPN configuration. I have attached a basic network diagram.

So, here is my network flow chart.

LAN -> Core Switch ->Fortigate ->Router -> Internet

So, the problem i have right now is, My fortigate WAN interfaces do not have a public IP. So, usually, we can use the public IP on the router, and configure the VPN tunnel on the Fortigate, and make the router forward the VPN traffic to the fortigate.

But, i do not have that comfort here as my Router already runs two S2S VPN tunnels and so the Router won't act as a relay device now.

I want to know if I can assign a public IP on the fortigate like a loopback IP and then build the IPSec Remote VPN. Just want to know if this is possible and i i can find any documents for it.

It would help me a lot if anyone can shed some light on it.

Thank you very much

Regards,

Vnagula