Mastodawn

Pelle Wessman Jun 21, 2023

Reminder that the only safe dummy domains to use are:

- example.com
- example.net
- example.org

And nowadays there's also a safe dummy TLD: .example

These are safe because they are reserved by IANA as as special-use domain names for documentation purposes on direction of IETF in RFC 2606 and RFC 6761.

Any other domain can be registered and as such should _never_ be used as a dummy domain for documentation or as eg. an example in default configs.

See: https://en.wikipedia.org/wiki/Example.com

example.com - Wikipedia

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Rpsu (326 ppm)

@voxpelli Cool, I had completely forgotten that the .example TLD exists.
The said RFC 2606 https://datatracker.ietf.org/doc/html/rfc2606 is probably the shortest RFC I’ve ever seen 🤓

RFC 2606: Reserved Top Level DNS Names

To reduce the likelihood of conflict and confusion, a few top level domain names are reserved for use in private testing, as examples in documentation, and the like. In addition, a few second level domain names reserved for use as examples are documented. This document specifies an Internet Best Current Practices for the Internet Community, and requests discussion and suggestions for improvements.

IETF Datatracker