Portfwd transparent proxy problem

[Jacco]

Hello all,

I'm trying to make portfwd, with transparent forwarding enabled, work on a 4.11-STABLE kernel with transparent proxy enabled (options IPFIREWALL_FORWARD      #enable transparent proxy support).
The make process of portfwd keeps showing: Transparent proxy support is NOT present in kernel.

I've read several manpages and searched the net but cannot find the answer.

Does anyone know a tip to make this work?

Thank you,
Jacco