If your Active Directory DNS server is not responding to external DNS requests, the following steps may help:
- Check the server server settings – Review and update the DNS server IP address settings, forwarders, and any other relevant settings.
- Reverse lookup zones – Check your reverse lookup zones to ensure that they are configured correctly.
- Update clients – Ensure that the Active Directory DNS server clients have their correct DNS server IP addresses configured, and that client-side DNS settings are correct.
- Restart the DNS server – Try restarting the DNS server to ensure that it is working properly.