DNS_HOSTNAME_EMPTY

The DNS_HOSTNAME_EMPTY error occurs when an empty DNS record is received as part of the DNS response while attempting to connect to a private IP from an external rewrite.

To troubleshoot this error, follow these steps:

1. Review DNS configuration: Check the DNS configuration to ensure that it's correctly set up and doesn't have any empty or incorrect entries
2. Check for private IP addresses: Ensure that the request isn't attempting to connect to a private IP address from an external source
3. Review application logs: Inspect the application logs for any warnings or errors related to DNS or the attempted connections