OPNsense in together with other Firewall (OPNsense Front / Sophos UTM Backend)

[Chrisca]

Hello,
Im new to OPNsense. Im using actually in my home network Sophos utm, and would like to keep Sophos utm in the backend, and add additionally OPNsense in front of Sophos and move service like openvpn client option from dmz 1 (DD WRT Router) to OPNsense, and also use DNSCrypt(DOH) on OPNsense as these nice features are not possible yet with Sophos.


I was wondering if someone here in the forum has some similar setup, using 2 firewalls, and can give me some tips what would be the best way to accomplish this setup?


Thank You!
Best regards
Chris