SSL offload: http header replace

I am doing SSL offload on on of our site.

 

 

BigIP is forwarding https request from the client to the server using https.

 

 

I need to write an iRule to change the http header for the http request from http to PROXYHTTPS.

 

 

Will I be changing the http Request or the http response?

 

 

when HTTP_REQUEST {

 

HTTP::header replace http PROXYHTTPS

 

}

 

 

or

 

 

when HTTP_RESPONSE {

 

HTTP::header replace http PROXYHTTPS

 

}

 

 

or

 

 

Both of the irule are not right

 

 

I will be applying the iRule to the Virtual Server with clientssl proxy.

 

 

I am new to iRule.

 

Please help!

 

 

Thanks

 

 

Raymond