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What is MaraDNS ?

MaraDNS is a free open-source computer program written by Sam Trenholme. I wrote MaraDNS while I was a college student and a travelling English teacher during the first 2000s decade. Now that I’m working as a professional software developer, the program is finished: I only provide bug fixes and other basic maintenance unless I’m getting paid.

MaraDNS implements the Domain Name System (DNS), an essential internet service. MaraDNS is open source software: This means that anyone is free to download, use, and modify the program free of charge, as per its license.

People like MaraDNS because it’s small, lightweight, easy to set up, and remarkably secure. It’s also cross platform — the program runs both in Windows and in UNIX clones.

More information describing MaraDNS is on the overview and summary page.

Current status

The most recent version of MaraDNS is MaraDNS 2.0.11, made on January 29, 2015. More information is in the blog.


MaraDNS support for bug reports is available by reporting an issue on GitHub (using Markdown formatting). Please note that this is mainly for reporting bugs. For those who need professional DNS support, please consider a commercial support contract for BIND; note that they cost at least $10,000 a year.

Mailing list

There is a low-traffic moderated mailing list where I post MaraDNS updates. To join the mailing list, send an email to

Mailing list archives are here: Archive #1 (Older messages) Archive #2

The old forum also has a read-only archive: Forum archive