IP to FQDN

I was assuming originally that you were using a network VIP and only wanted to rewrite the host header when certain host header values were seen. If you want to rewrite the host header on all requests, you can remove the check for an IP of 1.1.1.1 (or 2.2.2.2) in the host header value.

 

 

If for some reason you do want to check that the host header value is a specific IP address before rewriting the host header, you could continue to use the if {not ([catch... line. But you'd want to check for the VIP address, not the actual server address. This is because clients who use an IP address in the host header will be making a request to the VIP address (2.2.2.2)--not the pool member IP (1.1.1.1).

 

 

Aaron