Download zyxel-router2.ddns.net.crt Certificate from FTP or FTP AUTH SSL/TLS and install

bridgemode.bounceme.net

This VPN test has no internet just a connection test only but DNS by 192.168.138.2 is allowed

Run this in PowerShell after setup Set-VpnConnectionIPsecConfiguration -ConnectionName "zyxel-router2.ddns.net" -AuthenticationTransformConstants SHA256128 -CipherTransformConstants AES256 -EncryptionMethod AES256 -IntegrityCheckMethod SHA256 -PfsGroup PFS2 -DHGroup Group14 -PassThru -Force