Open-source alternatives to Nextdns

ExternalDNS is a controller that automatically synchronizes Kubernetes resource states with external DNS providers. It monitors cluster resources such as services, ingresses, and gateway APIs to dynamically create and update DNS records, enabling automated service discovery and external traffic management. The project features a provider-agnostic interface that supports a wide array of cloud-managed vendors and on-premises providers, as well as an extension system for custom providers via webhooks and sidecars. It implements a reconciliation loop that uses resource annotations and custom reso

This project provides a containerized DNS sinkhole and network-wide traffic filtering solution. It functions as a central network resolver that intercepts domain queries, allowing users to block advertisements, trackers, and malicious domains by returning null responses to connected devices. The platform distinguishes itself through its integrated DHCP server and comprehensive management capabilities, which allow for automated IP address allocation and granular control over network traffic. It supports complex filtering through regular expression matching, hierarchical rule prioritization, an

Webmin is a web-based administration interface for Unix systems. It provides a centralized console for managing the full range of server administration tasks — users and groups, software packages, storage, network configuration, system services, and security — all through a browser. Its modular architecture allows separate modules to handle databases (MySQL, MariaDB, PostgreSQL), web servers (Apache), DNS (BIND), email (Sendmail, Dovecot), file sharing (Samba, NFS), and more, with a unified access control system that restricts what each administrator can see and do. What sets Webmin apart is

mosdns is a DNS forwarding server and traffic filter that routes DNS queries to multiple upstream providers. It functions as a rule-based DNS router and a proxy for DNS-over-HTTPS and DNS-over-TLS to ensure secure DNS resolution. The system utilizes a pipeline-based request processing model and rule-based query routing to direct specific domain queries to different upstream servers. It implements pluggable transport layers and forwarding protocols, including HTTPS, TLS, and QUIC, to encrypt traffic and prevent eavesdropping. The project includes capabilities for upstream load balancing to di

Glider is a multi-protocol forward proxy, transparent proxy gateway, and network service provider. It functions as a DNS and DHCP server, a Linux IP set manager, and a network traffic load balancer. The project distinguishes itself through a protocol-translation bridge that translates traffic between different proxy schemes and a chain-based routing system that sequences multiple remote proxy servers. It supports transparent traffic interception at the system level and utilizes build-time protocol stripping to minimize the binary size of the executable. The system covers a broad range of net

Blocky is a stateless DNS proxy that functions as a network-wide ad-blocker and content filter. It operates as a single binary or Docker container with no database or persistent state, accepting DNS queries over UDP, TCP, HTTPS, TLS, QUIC, and HTTP/3 through a unified plugin-based query pipeline. The core of the system is a client-group policy engine that assigns devices to named groups and applies per-group blocklists, allowlists, and upstream resolvers, with all configuration changes applied through hot-reloading without requiring a restart. The project distinguishes itself through its modu

SmartDNS is a local recursive DNS resolver and server that manages granular query rules, dual-stack networking, and encrypted gateway proxying. It functions as a DNS traffic filter and DNS64 translator, allowing IPv6-only clients to communicate with IPv4 servers. The project distinguishes itself through parallel upstream querying, which sends requests to multiple servers simultaneously to return the response with the lowest network latency. It supports DNS server virtualization, enabling the operation of multiple independent server instances on different ports, each with its own configuration

DNSControl is an infrastructure-as-code tool designed to manage DNS records and zones across multiple providers through a unified, programmable configuration language. By treating DNS as code, it enables teams to maintain consistent infrastructure state, automate record updates, and perform version-controlled management of network settings across diverse cloud, registrar, and network DNS services. The system functions as a multi-provider orchestrator that uses a declarative reconciliation engine to compare local configurations against live remote states. It employs a provider-agnostic abstrac

Boto3 is the AWS SDK for Python, providing a programmatic interface for managing and automating AWS cloud infrastructure and services. It serves as a cloud management API client and resource manager for provisioning, configuring, and scaling virtual servers, databases, and storage. The library enables the implementation of infrastructure-as-code through declarative templates and scripts, allowing for the deployment of identical resource stacks across multiple accounts and geographic regions. It also provides a framework for coordinating distributed workflows, serverless functions, and contain

The AWS Cloud Development Kit is an infrastructure-as-code framework that enables developers to define and provision cloud resources using familiar programming languages. By utilizing construct-based synthesis, it translates high-level, object-oriented code into declarative templates, allowing for the automated management of complex cloud environments through a centralized, code-driven control plane. The framework distinguishes itself through its ability to model infrastructure as a dependency-aware resource graph, ensuring that components are provisioned and updated in the correct order. It

AdAway is an Android network firewall and DNS traffic filter that functions as a local VPN ad blocker. It intercepts network requests to prevent advertisements and tracking domains from reaching the device by filtering traffic against host lists. The project features a host file manager capable of importing and converting blocklists from external third-party providers. It includes a system for managing both blocked and allowed domains, allowing for the creation of custom rules to permit specific trusted sites or block individual domains. The tool provides granular traffic control through app

This project is a DNS privacy proxy and resolver that functions as a local bridge, converting plaintext DNS traffic into encrypted requests. It acts as a client for DNS-over-HTTPS and DNS-over-TLS protocols to prevent interception and spoofing of network requests. The system implements network privacy hardening by routing domain lookups through secure tunnels, which reduces the amount of plain text data leaked to internet service providers. It utilizes a profile-based connection management system to map security profiles to specific encrypted endpoints, preventing DNS hijacking and man-in-the

This project is a comprehensive repository of curated domain blocklists designed for network-wide DNS filtering. It functions as a DNS sinkhole feed, providing the necessary data to intercept and block unwanted network requests at the resolution layer before they reach their destination. By returning null or loopback addresses for identified domains, it prevents connections to malicious infrastructure, advertising servers, and tracking endpoints across all devices on a network. The repository distinguishes itself through a tiered categorization logic that allows users to select protection lev

Unbound is a DNS resolver that functions as a caching, recursive, and validating server. It translates domain names into IP addresses by performing independent lookups across the internet or by forwarding queries to external resolvers. The project distinguishes itself as a programmable DNS server, offering a Python scripting interface and dynamic shared-library loading to customize the resolution pipeline. It also serves as a DNS64 NAT64 gateway, synthesizing IPv6 addresses from IPv4 records to enable communication for IPv6-only clients. The system includes security frameworks for DNSSEC cry

dnscrypt-proxy is an anonymizing DNS proxy and encrypted DNS resolver. It acts as a local DNS forwarder that secures internet lookups by wrapping standard DNS queries in encrypted tunnels using the DNSCrypt and DNS-over-HTTPS protocols to prevent eavesdropping and tampering. The project provides network privacy protection by routing DNS requests through anonymized relays to obfuscate the client's original IP address. It further distinguishes itself through traffic management capabilities, such as mapping specific domains to designated resolvers and distributing queries across multiple servers

doggo is a multi-protocol DNS lookup client, performance analyzer, and diagnostic troubleshooting tool. It functions as a command-line utility for performing DNS queries across various transport protocols, including UDP, TCP, HTTPS, TLS, and QUIC. The project distinguishes itself through a focus on secure and distributed resolution. It implements encrypted DNS standards such as DNS over HTTPS, DNS over QUIC, and DNSCrypt, and provides DNSSEC validation to verify chains of trust for signed domains. Additionally, it can execute queries from global geographic locations via an external API to ana

AdguardFilters is a collection of curated adblock filter lists, content blocking rulesets, and DNS blocklists. Its primary purpose is to provide the rules necessary to identify and remove advertisements, tracking scripts, and intrusive elements across web browsers and applications. The project includes specialized rules for cosmetic filtering to hide layout gaps and a malware domain database to block phishing and spyware destinations. It provides distinct filtering sets for different regions and purposes, such as social media blocking. The repository covers broad capability areas including m

This project is an ad-blocking filter list and DNS blocklist collection designed to prevent advertisement and tracking servers from loading content across devices. It functions as a network-layer ad filter by providing a curated set of domain patterns and URLs that network components use to block known advertising and big data statistics domains. The collection focuses on privacy-focused domain filtering to stop the unauthorized collection of personal information and user tracking. It identifies and blocks domains associated with telemetry, analytics, and log collection to prevent the upload

AdRules is a collection of ad-blocking rule sets and DNS filter lists designed to identify and block malicious domains, trackers, and PCDN services. It functions as a DNS sinkhole filter and a malware domain blocklist used by DNS servers and network proxies to stop advertisements and harmful content from loading. The project provides regional network optimization, utilizing rule sets tailored to specific geographic regions, languages, and mobile device conditions to target local advertising networks. The system covers DNS traffic filtering and malware domain blocking through suffix-based dom

This project is a centralized management interface and orchestrator for deploying censorship circumvention protocols and stealth proxies. It functions as a network censorship bypass tool that routes traffic through encrypted communication protocols to avoid internet firewalls and regional blocks. The system distinguishes itself through a multi-protocol VPN manager and an automated proxy server orchestrator that handles software updates and system backups. It utilizes content delivery networks to mask origin server identities and implements encrypted DNS over HTTPS to prevent DNS poisoning and

This project provides a system-wide content filtering utility that controls network traffic by redirecting domain resolution requests to local null addresses. By mapping unwanted hostnames to these addresses at the operating system level, it effectively blocks connections to advertising, tracking, and malicious domains across all applications on a machine. The core of the system is a data-driven build pipeline that aggregates multiple curated source lists into a single, unified configuration file. This process is highly customizable, allowing users to employ declarative filtering logic throug

Tenta DNS is a recursive and authoritative domain name server implementation written in Go. It provides secure network resolution services by translating human-readable domain names into machine addresses while enforcing cryptographic standards to ensure data privacy and authenticity. The software distinguishes itself through a focus on secure transport and integrity verification. It utilizes encrypted tunnels for upstream communication to prevent eavesdropping and incorporates a validation engine to verify digital signatures on resource records. To manage global traffic, the system supports

Firejail is a Linux application sandbox and kernel security wrapper that isolates untrusted applications from the host system. It uses kernel namespaces and seccomp filters to restrict filesystem access, drop kernel capabilities, and limit the system attack surface. The project is distinguished by its use of predefined security profiles to automatically apply filesystem restrictions and syscall limits based on the executable being launched. It provides specialized isolation for portable packages such as AppImages and implements X11 display isolation via proxy servers to prevent keyboard loggi

Gluetun is a Docker VPN client gateway that routes network traffic from other containers through secure WireGuard or OpenVPN tunnels. It serves as a network gateway to mask origin IP addresses and provides a firewall kill switch that blocks all outbound traffic unless it is destined for the active VPN server. The project supports multiple commercial VPN providers and can maintain several simultaneous connections using custom configuration files. It includes an integrated proxy server stack hosting SOCKS5, HTTP, and Shadowsocks servers to tunnel TCP and UDP traffic. Security is managed throug

This project is a security hardening guide and privacy configuration manual for macOS. It provides a comprehensive set of instructions for configuring system settings to improve privacy, reduce the attack surface, and implement a malware defense framework. The guide covers technical methods for validating software notarization, verifying application sandboxing, and auditing system activity. It distinguishes itself by providing detailed workflows for restricting high-risk features and applying advanced security configurations to protect the operating system. The documentation covers several k

TV is a media streaming management application used to organize and play on-demand videos and live television channels from various web sources through a single interface. It functions as a hub for IPTV channel organization and media discovery. The project utilizes a modular system of crawler scripts to aggregate content and extract metadata from external websites. It manages network connectivity through encrypted DNS, proxy rules, and domain-based routing to filter traffic and bypass regional content restrictions. The application supports hardware-accelerated video decoding, electronic prog

Simplewall is an application firewall manager and network traffic filter that provides a graphical interface for the Windows Filtering Platform. It controls inbound and outbound network access for individual programs and services by intercepting and filtering traffic at the kernel level. The project identifies specific binaries using file hashes to prevent spoofing and allows users to define custom firewall rules based on IP addresses, CIDR ranges, and port numbers. It includes a system for blocking operating system telemetry and managing blocklists of known malicious IP addresses. The tool