Info about Site to Site VPN in IPSEC

I’ve never used the Zyxel routers but the MikroTik can handle a Site-To-Site VPN using IPSec/IKE. You might want to take a look at these links:

  1. ipsec IKEv1 to Zyxel USG [SOLVED]
  2. How to configure IPSec VPN (Site-to-Site) between Mikrotik and Zyxel Zywall