Where should I put NetWeaver Gateway?

Hello,

Where should I put NetWeaver Gateway?

Fiori AP Server?

S/4 HANA AP Server?

Dedicated Server?

Other?

#Our system configuration
Internet(like SalesForce) -> Web Dispatcher*1 -> Fiori AP Server*1 -> S/4 HANA AP Server*2

*1: DMZ

*2: MZ

#S/4 HANA On-premise

Thanks,

Sano