[db-wg] Reverse DNS Wizard Improvements

Dear colleagues,

If you don't want to read all the details below, here is a single screenshot that explains the improvements we just launched:
https://labs.ripe.net/Members/AlexBand/reverse-dns-real-time-checks

A few weeks ago we announced a new wizard for setting up Reverse DNS. When creating a new DOMAIN object you will be taken to it automatically:
https://apps.db.ripe.net/webupdates

To refresh your memory, a one-minute demo of the wizard is online:
https://youtu.be/7JzapYkca-Y

After analysing the usage since the launch, we have identified several improvements we could make to the name server pre-checks. I'm happy to announce these are now live. When entering name servers for your reverse zones, we will now do the following real-time checks:

- Syntax checks to ensure no illegal characters are used
- Verify if a fully qualified domain name is entered and not an IP address
- Test if the name server responds on port 53 using both UDP and TCP
- Check if the name server is authoritative for the reverse zone

Only if these tests are passed the wizard will allow the user to submit the form, after which the full set of checks is performed by the back-end service. By giving immediate feedback, we drastically reduce the amount of errors users generate and the time required to complete the process successfully. In the error messages, we also link to the documentation for an in-depth explanation and troubleshooting steps.

We are confident these improvements will greatly enhance the user experience. If you have any questions or feedback, please do not hesitate to let us know!

Kind regards,

Alex Band
Product Manager
RIPE NCC