Cannot establish IPHTTPS connection.

My guess is that your servers are not sending reply traffic back through the BIG-IP. One of the features of the Performance HTTP profile is to automatically translate the source address of the connection from the client's real address to an address owned by the BIG-IP (in BIG-IP parlance, this behavior is called "SNAT"). You can achieve the same behavior with a Performance L4 profile by manually enabling SNAT on the virtual server.

 

 

Here's a link to the portion of the BIG-IP configuration guide that covers SNATs:

 

 

http://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm_configuration_guide_10_1/ltm_snat.html

 

 

Hope this helps!