Portal Access and Layerd VS

we (must) use a Layerd VS in front of a Multi Domain SSO page and now we whant to use a Web Application using Portal Access.

The Problem is that this Application uses the F5_Warper (cash-fs.js) and F5 generates a "wrong" Hostname in the injected ur_firepass_host variable because APM uses the protocol of the layerd VS (Port 80) and not from the front VS (443)

if(typeof(F5_flush)!=='function'){
var ur_firepass_host='http://FQDN';--> should be https://FQDN
var F5_HT_adm_enabled='1';
.....

We know that we can solve that when we also use a SSL Profile (Server) on the front VS and a SSL Profile (Client) on the layerd VS but we hope to find a better way to save the resources especially with the Portal Access.

Manipulation the server.network.protocol via Irule will not work.