Catch all

Hello Al,

I'm not sure I follow. Are you wanting to use a rule to insert a new header with the client IP address as the value if the header doesn't already exist in the request?

If so, you can use something like this:

when HTTP_REQUEST {
    Check if HTTP header X is not present in the request and does not have value
   if {not ([string length [HTTP::header value X])]}{
      HTTP::header insert X [IP::client_addr]
   }
}

Aaron