Need to change request host & uri before reaching server

Hello Mohamed.

You can try something like this:

when HTTP_REQUEST {
	if { [HTTP::host] equals"subdomain.domain1.com"} {
		HTTP::header replace Host "domain2.com"
		HTTP::uri /uri[HTTP::uri]
	}
}

This example modifies Host header and also concats "/uri" string to the whole URI sentence.

Regards,

Dario.