Open source software

We develop and contribute to a number of free/libre and open source software packages as part of providing these services. Much of our software is also used by other organizations around the world.

• We are frequent contributors to the DNS server software ISC BIND

• We wrote nsdiff which is a key part of our DNS update mechanism.

• The nsnotifyd program can run a script when a DNS zone changes.

• Our DNS-over-TLS and DNS-over-HTTPS service uses doh101

• Secret keys and passwords in our configuration management system are encrypted using regpg

Other contributions:

• A data structure called a qp trie which is a small and fast wide-fan-out radix tree. It has been adopted by Knot DNS and the Knot Resolver as the primary data structure for DNS data.

• In the 1990s our makezones DNS build script was included in the BIND 4 distribution. There are some noes on makezones in Philip Hazel's technical autobiography.

The source code for the IP Register system is published, but it is not intended for use by other sites.

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