djbdns
The facts below are what the maker publishes about djbdns, checked and dated. Our editors have not written about it yet.
Plans and prices
From djbdns's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| djbdns-1.05 | Free | Free to download, compile, and run · latest published package named djbdns-1.05.tar.gz |
The facts
Each one read from djbdns's own pages, with the date it was checked.
What it does
- Cache protection
- The maker says dnscache uses unpredictable query IDs and UDP ports and is immune to cache poisoning.checked 9 Oct 2026
- Client tools
- The package includes a DNS client C library and command-line utilities for sending requests to DNS caches.checked 9 Oct 2026
- Debugging
- The package includes DNS debugging tools, including dnstrace for diagnosing misconfigured remote servers.checked 9 Oct 2026
- Distribution terms
- The maker states that the djbdns package was placed in the public domain on 2007-12-28.checked 9 Oct 2026
- DNS cache
- The dnscache program finds addresses of Internet hosts and can run on a workstation or for an ISP's customers.checked 9 Oct 2026
- DNS server
- The tinydns program publishes locally configured IP address information in response to iterative DNS queries.checked 9 Oct 2026
- Latest package
- The installation page identifies djbdns-1.05.tar.gz as the latest published package.checked 9 Oct 2026
- Prerequisites
- The maker's installation instructions require daemontools 0.70 or above and ucspi-tcp to be installed first.checked 9 Oct 2026
- Purpose
- djbdns is a collection of tools for DNS caching, serving, client lookups, and debugging.checked 9 Oct 2026
- Security design
- The maker's security page says dnscache, tinydns, and walldns run under dedicated non-root accounts in chroot jails.checked 9 Oct 2026
- Security guarantee
- The maker offers $1000 to the first person to publicly report a verifiable security hole in the latest version, with stated exclusions including denial-of-service attacks.checked 9 Oct 2026
- Server limitation
- tinydns listens for UDP queries on port 53 and does not listen for TCP queries; the maker documents axfrdns for TCP service and zone transfers.checked 9 Oct 2026
- Support
- The maker points users to the dns mailing list and says third-party commercial support is available.checked 9 Oct 2026
Where it runs
- OS support
- The installation page says djbdns works only under UNIX and specifically says SCO UnixWare is unsupported.checked 9 Oct 2026
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