Pool member FQDN on server side, Virtual server name on client side web browser

Sorry I made a mistake with my copy/paste...

This should be better :

when HTTP_REQUEST {
    if { [string tolower [HTTP::host]] equals "vserver.domain.com"} {
        HTTP::header replace Host "poolmem1.domain.com"
    }
}
when HTTP_RESPONSE {
    if { [string tolower [HTTP::header Location]] equals "poolmem1.domain.com"} {
        HTTP::header replace Location "vserver.domain.com"
    }
}