IIS Subdomain Host Headers Not Working

Question

Using IIS 7, I have an existing website, example.com, and I have added another website to which I'd like the URL, sub.example.com to point. I've set up the host headers for this, but it does not work. Trying to ping the subdomain URL give the message "Ping request could not find host sub.example.com. Please check the name and try again."

Should a DNS setting perhaps be set?

Answer 1

The subdomain must be set in the DNS or it will not resolve to an IP address. Just having it defined in IIS is not enough. The client computer must be able to translate the name into a meaningful server address.