Project Summary
Knot DNS Resolver is a caching full resolver implementation written in C and LuaJIT, both a resolver library and a daemon. The core architecture is tiny and efficient, and provides a foundation and a state-machine like API for extensions. There are three modules built-in - iterator, validator, cache, and a few more are loaded by default. Most of the rich features are written in Lua(JIT) and C. Batteries are included, but optional.
In a Nutshell, Knot Resolver...
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has a well established, mature codebase
maintained by a large development team
with decreasing Y-O-Y commits -
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took an estimated 24 years of effort (COCOMO model)
starting with its first commit in June, 2014
ending with its most recent commit about 1 month ago
Quick Reference
GNU General Public License v3.0 only
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
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Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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Code locations have been removed since last analysis
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.
Code
Activity
Community
30 Day SummaryJun 20 2026 — Jul 20 2026
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12 Month SummaryJul 20 2025 — Jul 20 2026
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Static Analysis ( Generated by Coverity Scan for CZ-NIC/knot-resolver )
Repository URL: https://github.com/CZ-NIC/knot-resolver
Version: v6.3.0-6-g7c1a102f8
- 2026-05-13
- Last Analyzed
- 220,119
- Lines of Code Analyze
- 0.43
- Defect Density
Defects by status for current build
- 157
- Total defects
- 30
- Outstanding
- 101
- Fixed