After some additional testing, I have made available a second version of 
1.2b7 where I integrated TransProxy v1.5, *-1.2b7_tproxy2.*, see
http://m0n0.ch/wall/list-dev/?action=show_msg&actionargs[]=7&actionargs[]=85

This second test version now supports all option switches of tproxy, 
except for logging (nor syslog) is not yet properly supported, even 
tough some infrastructure is there already.

I can also make a WRAP image available if helpful for testers.

Thanks in advance for any feedback,
Rolf