HTTP Redirect to Different Domain

What URLs on those hosts do you want to send to a login page? Do you want to tie that to the presence of a session of a cookie? Might end up with some redirect loops otherwise. The basic structure you are looking for:

when HTTP_REQUEST {
  switch [HTTP::host] {
    "www.sub.com" {
      if { [string tolower [HTTP::uri]] eq "" } {
        HTTP::respond 301 Location "http://sub.domain.com/OLA/faces/login.jspx?"
      }
    }
    "sub.domain.com" -
    "domain2.com" {
      if { [string tolower [HTTP::uri]] eq "" } {
        HTTP::respond 301 Location "http://[HTTP::host]/OLA/faces/login.jspx?"
      }
    }
    default { reject }
  }
}