I would like to realize this scenario:
- FW1 with OPNsense and WAN with static IP.
- FW2 with software not under my control; it can be OPNsense or something else or even a simple router.
- Both have Wireguard.
- FW2 WAN is with Dynamic IP and a DDNS.
- FW1 must create a VPN to FW2 (not vice versa, from FW2 to FW1).
Is it possible to achieve it?
What precautions should I take into consideration?