F5 APM citrix webtop and portal access issue :(

Portal Access (reverse proxy rewrite) is activated when the client requests something like "$$/yyyyy and there is a rewrite profile attached to the virtual server.

Where xxxxx is the scheme, host, port, and hostname encoded in hex. yyyyy is the URI in plaintext.

In order for this to work, BIG-IP must be able to:

1. Resolve the hostname in the xxxxx part using the BIG-IP's DNS client.
2. Negotiate serverside SSL, if applicable
3. Route (SNAT basically) the traffic from a self-IP to the hostname.

Make sure that the client is issuing such request by carefully looking at the network requests from the browser using HTTPWatch or Dev Tools on your browser, and that the BIG-IP conditions are met correctly.