Browse free open source DNS software and projects below. Use the toggles on the left to filter open source DNS software by OS, license, language, programming language, and project status.

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  • 1
    NextDNS

    NextDNS

    NextDNS CLI client (DoH Proxy)

    NextDNS protects you from all kinds of security threats, blocks ads and trackers on websites and in apps and provides a safe and supervised Internet for kids, on all devices and on all networks. Determine your threat model and fine-tune your security strategy by enabling 10+ different types of protections. Use the most trusted threat intelligence feeds containing millions of malicious domains, all updated in real-time. Go beyond the domain, we analyze DNS questions and answers on-the-fly (in a matter of nanoseconds) in order to detect and block malicious behavior. With usually only a few hours between domain registration and the start of an attack, our threat intelligence system is built to catch malicious domains earlier than classic security solutions. Block ads and trackers on websites and in apps, including the most devious ones. Use the most popular ads & trackers blocklists, millions of domains all updated in real-time.
    Downloads: 23 This Week
    Last Update:
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  • 2

    Visual Synapse

    Moved to GitHub → https://github.com/yoctobyte/visualsynapse

    Moved to GitHub → https://github.com/yoctobyte/visualsynapse --- Visual Synapse are component wrappers around the Synapse tcp/ip libraries. It wraps a few common internet protocols, like HTTP, UDP, DNS, ICMP, TCP and SMTP to multi-threaded components that can be used with Delphi, Kylix, Freepascal and C++ Builder.
    Downloads: 3 This Week
    Last Update:
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  • 3

    DNS rewriter

    simple local dns that either answer query or forward them

    Local DNS server, that act as a proxy and will rewrite request according to a config file and an "active" environement. Usefull to switch easily between diffent configuration without touch the host file. small web server embeded to display current configuration, control active environment and reload configuraiton.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4
    The EPPTT is a flexible, script based EPP client. It can be used to mount fully automated and comprehensive tests against different implementations of EPP. It has both an intutive command line interface as well as a user friendly web interface. EPPTT
    Downloads: 1 This Week
    Last Update:
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  • 5

    rldns

    rldns is an open source lightweight DNS server for linux & bsd (x64)

    rldns is an open-source, lightweight DNS server designed for Linux, NetBSD, FreeBSD, and OpenBSD. It supports both x86 and x86_64 architectures. Developed by Antonius (w1sdom) from bluedragonsec.com Latest Update: Version 1.3 (Released February 2026). This release includes core performance optimizations and enhanced query handling.
    Downloads: 1 This Week
    Last Update:
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  • 6
    DCF is based on ACE,it provides a optional Name-Service for locating service, a single interface for both client and server. Anyone can embed DCF in a program to implement communication easily.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    This library makes SRV records in DNS simple to use; actually, due to the fallback for classical connection mechanisms, it makes building a network connection in general extremely simple.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    A pure java DNS client implementation. Consists of a library and utilities for looking up the Internet domain names. The utilities are also able to fetch an entire domain zone and save it in the standard DNS zone file format.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    This project provides an object-oriented and extensible PHP library for managing DNS zones/domains/hosts for the PowerDNS server. It provides a single, consistent interface to access various databases and LDAP directories
    Downloads: 0 This Week
    Last Update:
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  • 10
    PHPBind9 is a PHP5 class-library which allows webdevelopers to easely read and modify DNS zonefiles and the Bind9 configuration file "named.conf".
    Downloads: 0 This Week
    Last Update:
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  • 11
    Simple COM based DNS resolver
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Eclipse plugin and library to create - text-editor with synthax-highlighting describe by a regular granmar. - outline view based on the same granmar The first implemntation is a named-file editor (DNS)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Powerfull DNS Server (fully customizable and *scriptable*) and pure Java DNS Protocol implementation
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14

    domain_scan

    scan unregister domain names For more info, visit http://www.mama.me

    scan unregister domain names VC++ 2005 developed on windows platform For more info, please visit http://www.mama.me
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    hostupd is a command-line tool which allows the user to update a dns server which supports dynamic updates (rfc2136), such as bind >= 8. Its main goal is to simplify the dns-updating task, but to remain flexible.
    Downloads: 0 This Week
    Last Update:
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  • 16
    JNeta is a Java WebStart client that can easily run light server and client components like HTTP, FTP, DHCP servers and so on. It aims to be a complete extensible plaftorm on server and client side thanks to its plug-in architecture.
    Downloads: 0 This Week
    Last Update:
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  • 17
    An open project for a number of activex controls for use in the Windows environment. The controls have been sold commerical before by Eurosource (http://www.eurosource.se) but are now free complete with source code.
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    Downloads: 7 This Week
    Last Update:
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