Topics / #networking

Networking projects on GitHub

Network programming, protocols, and traffic analysis in applications.

As of , the most-starred Networking projects on GitHub are build-your-own-x (553.8K stars), linux (252.2K stars) and the-book-of-secret-knowledge (250.7K stars). GitHub.Locker tracks 565 Networking repositories with 11.7M stars combined. The fastest-growing on October 16 was build-your-own-x, with +380 stars in a day.

565Projects
11.7MStars in total
+7.4KStars in a day

Hot right now

Most stars gained in a day · Oct 16

The all-time top

Top 100 of 565 · by stars

  1. #1 · codecrafters-io/build-your-own-x

    build-your-own-x

    It's a curated collection of step-by-step guides that show you how to rebuild popular technologies (databases, game engines, blockchains, compilers, web browsers, etc.) from scratch, so you understand how they really work.

    553.8K
  2. #2 · torvalds/linux

    linux

    This is the Linux kernel itself - the core of any Linux operating system. It manages hardware and system resources and provides the fundamental services all other software runs on.

    252.2K
  3. #3 · trimstray/the-book-of-secret-knowledge

    the-book-of-secret-knowledge

    A massive curated collection of lists, manuals, cheatsheets, blogs, hacks, one-liners and CLI/GUI/web tools that the author gathers from everyday sysadmin, DevOps and security work.

    250.7K
  1. 4

    FreeDomain

    204.5KDigitalPlatDev/FreeDomain · Markdown

    DigitalPlat FreeDomain is a free domain registration service paired with a practical, book-style DNS learning guide, taking you from claiming a domain all the way through setting up a website, email and DNS operations.

  2. 5

    awesome-go

    188.8Kavelino/awesome-go · Go

    A curated list of awesome Go frameworks, libraries, and software, organized by category.

  3. 6

    CS-Notes

    186.3KCyC2018/CS-Notes

    CS-Notes is a huge Chinese-language collection of study notes covering the core topics of technical coding interviews: algorithms, LeetCode solutions, operating systems, computer networks, databases, Java, and system design.

  4. 7

    clash-verge-rev

    151.9Kclash-verge-rev/clash-verge-rev · Rust

    Clash Verge Rev is a modern desktop GUI client for the Clash Meta (mihomo) proxy core, letting you manage proxy configurations visually on Windows, macOS, and Linux.

  5. 8

    free-for-dev

    139.7Kripienaar/free-for-dev · HTML

    A curated list of SaaS, PaaS, and IaaS offerings that have free tiers useful for DevOps engineers, sysadmins, and infrastructure developers.

  6. 9

    rustdesk

    126.1Krustdesk/rustdesk · Rust

    RustDesk is an open-source remote desktop application written in Rust, positioned as a self-hostable alternative to TeamViewer.

  7. 10

    v2rayN

    118.4K2dust/v2rayN · C#

    v2rayN is a free, open-source GUI client for Windows, Linux and macOS that manages proxy connections using protocols like V2Ray, Xray, sing-box, Trojan, Shadowsocks and others.

  8. 11

    frp

    110Kfatedier/frp · Go

    frp is a fast reverse proxy that lets you expose a local server sitting behind a NAT or firewall to the internet, forwarding TCP, UDP, HTTP and HTTPS traffic, with an optional P2P mode for direct client-to-client transfers.

  9. 12

    axios

    109.3Kaxios/axios · JavaScript

    axios is a promise-based HTTP client for JavaScript: you use it to send requests to APIs and servers and then work with the responses as promises.

  10. 13

    RuView

    98.4Kruvnet/RuView · Rust

    RuView turns ordinary WiFi signals into a spatial-intelligence sensor — it detects presence, measures breathing and heart rate, tracks motion and falls, and even estimates body pose through walls, using Channel State Information (CSI) captured by cheap ESP32 boards, with no cameras or wearables.

  11. 14

    system-design-101

    90.5KByteByteGoHq/system-design-101

    A free, visual collection of short explainers and cheat sheets covering core system design concepts (APIs, databases, caching, message queues, real-world company architectures) to help you understand how production systems work and prepare for system design interviews.

  12. 15

    syncthing

    89.5Ksyncthing/syncthing · Go

    Syncthing is an open-source continuous file synchronization program that keeps files in sync between two or more computers over a peer-to-peer connection.

  13. 16

    devops-exercises

    84.9Kbregman-arie/devops-exercises · Python

    A massive collection of over 2600 DevOps and SRE interview questions and exercises covering Linux, networking, Kubernetes, AWS, Python, Ansible, Terraform, and many other technical topics.

  14. 17

    caddy

    78.1Kcaddyserver/caddy · Go

    Caddy is a fast, extensible web server written in Go that enables HTTPS automatically by default. It can act as an HTTP/1-2-3 server, reverse proxy, and general platform for running Go-based 'apps' (modules).

  15. 18

    cs-self-learning

    76.3KPKUFlyingPig/cs-self-learning · HTML

    A free, open-source online guide that curates the best open courseware from top international universities so anyone can self-study computer science from scratch, aiming to turn a beginner into a well-rounded programmer in 2-3 years.

  16. 19

    awesome-cpp

    73.8Kfffaraz/awesome-cpp

    A curated list (awesome-list) of C and C++ frameworks, libraries, tools, and resources, organized by category like AI, audio, networking, GUI, databases, and more.

  17. 20

    awesome-courses

    71.9Kprakhar1989/awesome-courses

    It is a curated list of free, high-quality computer science courses from universities around the world, each one making its lecture materials, assignments, notes and readings available online.

  18. 21

    traefik

    65.3Ktraefik/traefik · Go

    Traefik is a modern HTTP reverse proxy and load balancer built to make deploying and exposing microservices easy, with automatic configuration based on your infrastructure.

  19. 22

    v2rayNG

    64.1K2dust/v2rayNG · Kotlin

    v2rayNG is an Android client for V2Ray that lets you connect through proxy servers using either the Xray core or the v2fly core, supporting protocols like VMess, VLESS, Trojan, Shadowsocks and SOCKS5.

  20. 23

    socket.io

    63.2Ksocketio/socket.io · TypeScript

    Socket.IO is a library that enables bidirectional, low-latency, real-time communication between a Node.js server and clients such as browsers or mobile apps.

  21. 24

    pi-hole

    61.3Kpi-hole/pi-hole · Shell

    Pi-hole is a DNS sinkhole that blocks ads and trackers for every device on your network, without needing any software installed on the devices themselves.

  22. 25

    architect-awesome

    60.8Kxingshaocheng/architect-awesome

    A curated technical roadmap in Chinese for backend engineers aiming to become architects, mapping out data structures, algorithms, concurrency, databases, middleware, and system design.

  23. 26

    rclone

    60.4Krclone/rclone · Go

    Rclone is a command-line program that syncs files and directories to and from dozens of different cloud storage providers, like an 'rsync for the cloud'.

  24. 27

    shadowsocks-windows

    59.5Kshadowsocks/shadowsocks-windows · C#

    Shadowsocks-windows is a Windows desktop client for Shadowsocks, a SOCKS5/HTTP proxy protocol designed to circumvent internet censorship, written in C#.

  25. 28

    jellyfin

    58.1Kjellyfin/jellyfin · C#

    Jellyfin is a free, open-source media server backend that lets you organize and stream your own movies, shows, and music to apps on other devices, similar to Plex or Emby but with no premium tiers.

  26. 29

    fuel-core

    56.8KFuelLabs/fuel-core · Rust

    Fuel-core is the official Rust implementation of a full node for the Fuel v2 blockchain protocol, used to run and participate in Fuel networks such as Ignition, Testnet, and Devnet.

  27. 30

    FlClash

    56.2Kchen08209/FlClash · Dart

    FlClash is a multi-platform proxy client built on ClashMeta. It is simple, open-source, ad-free, and lets you manage proxy subscriptions and connections across devices.

  28. 31

    trackerslist

    55.4Kngosang/trackerslist

    A collection of lists of public BitTorrent trackers that is checked and updated automatically every day, intended to be added to torrents or magnet links to improve peer discovery.

  29. 32

    requests

    54.5Kpsf/requests · Python

    It is a simple, yet elegant, HTTP library for Python that lets you send HTTP/1.1 requests extremely easily.

  30. 33

    windows

    53.6Kdockur/windows · Shell

    dockur/windows runs a full, real Windows installation inside a Docker container, automatically downloading and installing it with no manual steps.

  31. 34

    awesome-ios

    53.6Kvsouza/awesome-ios · Swift

    A curated list of awesome resources for the iOS ecosystem, covering both Objective-C and Swift projects across dozens of categories like analytics, networking, UI, architecture, and ARKit.

  32. 35

    Docker-OSX

    53Ksickcodes/Docker-OSX · Shell

    Docker-OSX lets you run a full macOS virtual machine inside a Docker container using KVM, giving near-native performance for security research, CI/CD, and development without owning a real Mac.

  33. 36

    professional-programming

    51.6Kcharlax/professional-programming · Python

    It's a curated collection of learning resources (articles, books, talks, papers) meant to make software engineers more well-rounded professionals, covering everything from algorithms to career growth to system architecture.

  34. 37

    go-ethereum

    51.4Kethereum/go-ethereum · Go

    Go-ethereum (geth) is the Go implementation of the Ethereum protocol — the main CLI client used to run a full Ethereum node, sync the blockchain, and expose JSON-RPC APIs to interact with the network.

  35. 38

    kubernetes-the-hard-way

    50.4Kkelseyhightower/kubernetes-the-hard-way

    A step-by-step tutorial that walks you through bootstrapping a Kubernetes cluster manually, without any automation scripts, so you learn how every component actually works.

  36. 39

    Projects

    48Kkaran/Projects

    A curated list of practical programming project ideas, grouped by category, that anyone can solve in any programming language.

  37. 40

    acme.sh

    47.8Kacmesh-official/acme.sh · Shell

    acme.sh is a pure Unix shell script client for the ACME protocol that automatically issues, renews, and installs free SSL/TLS certificates from CAs like Let's Encrypt or ZeroSSL.

  38. 41

    ClashMetaForAndroid

    47.8KMetaCubeX/ClashMetaForAndroid · Kotlin

    Clash Meta for Android (CMFA) is the graphical Android app for Clash.Meta, letting you run a rule-based proxy/VPN tunnel on your phone with a UI instead of editing config files by hand.

  39. 42

    okhttp

    47.1Klysine-dev/okhttp · Kotlin

    OkHttp is an efficient HTTP client for the JVM, Android, and GraalVM, handling HTTP/1.1, HTTP/2, websockets, and SSE with connection pooling and transparent GZIP.

  40. 43

    copyparty

    47.1K9001/copyparty · Python

    copyparty is a portable, single-file server that turns almost any device into a full-featured file server, supporting resumable uploads/downloads over HTTP(S), WebDAV, SFTP, FTP(S), TFTP and SMB, with a built-in media player, thumbnails and search.

  41. 44

    v2ray-core

    46.9Kv2ray/v2ray-core · Go

    Project V (v2ray-core) is a set of network tools for building your own proxy network that secures your connections and helps you bypass network restrictions while protecting your privacy.

  42. 45

    mitmproxy

    45.7Kmitmproxy/mitmproxy · Python

    mitmproxy is an interactive, SSL/TLS-capable intercepting proxy for HTTP/1, HTTP/2, and WebSockets, used by penetration testers and developers to inspect and modify traffic. mitmdump is its CLI version, and mitmweb is a web-based interface.

  43. 46

    grpc

    45.4Kgrpc/grpc · C++

    gRPC is a modern, high-performance open-source RPC (remote procedure call) framework that lets client and server applications communicate transparently across languages and platforms.

  44. 47

    headscale

    44.7Kjuanfont/headscale · Go

    Headscale is an open source, self-hosted implementation of the Tailscale control server, letting you run your own private Tailscale-compatible network instead of paying for Tailscale's hosted service.

  45. 48

    retrofit

    43.9Klysine-dev/retrofit · Java

    Retrofit is a type-safe HTTP client for Android and the JVM, created by Square. It lets you define your REST API as a Java/Kotlin interface and turns HTTP calls into simple method calls.

  46. 49

    what-happens-when

    43.4Kalex/what-happens-when

    A long-form, extremely detailed walkthrough answering the classic interview question of what happens when you type google.com into your browser and press enter, tracing the whole path from keypress to rendered page.

  47. 50

    aria2

    43.1Karia2/aria2 · C++

    aria2 is a lightweight, cross-platform command-line download utility that fetches files over HTTP(S), FTP, SFTP, BitTorrent, and Metalink, and can combine multiple protocols/sources for the same file to maximize bandwidth.

  48. 51

    curl

    43.1Kcurl/curl · C

    curl is a command-line tool and library (libcurl) for transferring data to or from a server using URL syntax.

  49. 52

    free

    42.8Kfreefq/free

    A regularly updated list of free proxy/VPN server nodes (ss/v2ray/trojan/vmess) scraped from the internet, meant to help users in China bypass the Great Firewall and access blocked sites.

  50. 53

    awesome-system-design-resources

    42.4Kashishps1/awesome-system-design-resources · Java

    A free, curated collection of System Design resources: core concepts, networking and API fundamentals, database and caching basics, distributed systems patterns, and a huge list of interview problems, books, courses, and papers — all aimed at prepping for System Design interviews.

  51. 54

    Alamofire

    42.4KAlamofire/Alamofire · Swift

    Alamofire is an HTTP networking library written in Swift. It wraps Apple's URLSession so iOS, macOS, tvOS, and watchOS apps can make requests in a few lines of chainable code.

  52. 55

    Sunshine

    42.3KLizardByte/Sunshine · C++

    Sunshine is a self-hosted game streaming host that lets you play PC games remotely using any Moonlight client, with hardware-accelerated encoding on AMD, Intel, or Nvidia GPUs (or software encoding as a fallback).

  53. 56

    sniffnet

    41.6KGyulyVGC/sniffnet · Rust

    Sniffnet is a cross-platform desktop app for monitoring your network traffic in real time, with a graphical interface instead of raw terminal output.

  54. 57

    qBittorrent

    40.9Kqbittorrent/qBittorrent · C++

    qBittorrent is a free, open-source BitTorrent client written in C++ with Qt, built on top of the libtorrent engine. It aims to be a solid alternative to other torrent clients, focusing on speed, stability, and Unicode support.

  55. 58

    sing-box

    38.9KSagerNet/sing-box · Go

    sing-box describes itself as 'the universal proxy platform' — a single Go program meant to run and configure various proxy protocols instead of needing separate tools for each one.

  56. 59

    istio

    38.4Kistio/istio · Go

    Istio is an open-source service mesh that layers transparently onto existing distributed applications, giving you a uniform way to secure, connect, and monitor microservices with few or no code changes.

  57. 60

    interview

    38.2Khuihut/interview · C++

    A large Chinese-language knowledge base summarizing core C/C++ interview topics — language features, STL, data structures, algorithms, operating systems, networking, databases, design patterns, and the linker/loader — aimed at students and job seekers preparing for C/C++ technical interviews.

  58. 61

    tailscale

    37.7Ktailscale/tailscale · Go

    Tailscale is a mesh VPN built on WireGuard that creates secure private networks between your devices with minimal configuration, adding 2FA/SSO login on top.

  59. 62

    AdGuardHome

    37.5KAdguardTeam/AdGuardHome · TypeScript

    A free, open-source network-wide DNS server that blocks ads and trackers for every device on your home network: it re-routes tracking domains to a 'black hole', so no client-side software is needed on the devices themselves.

  60. 63

    firecracker

    37.4Kfirecracker-microvm/firecracker · Rust

    Firecracker is an open-source virtualization technology for creating and managing secure, multi-tenant microVMs for container and function-based serverless workloads.

  61. 64

    interview_internal_reference

    37.3K0voice/interview_internal_reference · Python

    A curated collection of real technical interview questions and answers from major Chinese tech companies — Alibaba, Tencent, Baidu, Meituan, ByteDance and more — with analysis from expert interviewers.

  62. 65

    awesome-docker

    37.1Kveggiemonk/awesome-docker

    A curated ('awesome list') index of Docker-related projects and resources: engines, image builders, registries, orchestration tools, networking/security tooling, desktop/terminal UIs and learning materials.

  63. 66

    shadowsocks-android

    36.8Kshadowsocks/shadowsocks-android · Kotlin

    This is the official Shadowsocks client app for Android, Chrome OS, and Android TV, letting you route your device's traffic through a Shadowsocks proxy server.

  64. 67

    bitchat

    36.6Kpermissionlesstech/bitchat · Swift

    BitChat is a decentralized peer-to-peer messaging app that uses Bluetooth mesh for offline, local chat and the Nostr protocol for internet-based global reach, with no accounts, phone numbers, or central servers.

  65. 68

    node

    36.4Kinkonchain/node · Shell

    A Docker Compose setup for running an Ink node (an Ethereum L2 built on the OP Stack), including the execution client, rollup node, and monitoring stack.

  66. 69

    awesome-sysadmin

    35.4Kawesome-foss/awesome-sysadmin

    A curated list of free and open-source sysadmin tools, covering everything from backups and configuration management to monitoring, CI/CD, virtualization, and VPNs.

  67. 70

    netty

    35.1Knetty/netty · Java

    Netty is an asynchronous, event-driven network application framework for Java, used to rapidly build maintainable, high-performance protocol servers and clients.

  68. 71

    zapret-discord-youtube

    34.8KFlowseal/zapret-discord-youtube · Batchfile

    A free Windows toolkit of batch scripts around bol-van's zapret that runs DPI-bypass strategies to restore access to Discord and YouTube — no VPN or subscription involved.

  69. 72

    nginx-proxy-manager

    34.4KNginxProxyManager/nginx-proxy-manager · TypeScript

    Nginx Proxy Manager is a pre-built Docker container that gives you a web admin interface to manage Nginx reverse proxy hosts, including free SSL certificates, without needing to know Nginx configuration.

  70. 73

    nps

    34.2Kehang-io/nps · Go

    NPS is a lightweight, high-performance intranet penetration (reverse proxy/tunnel) server that exposes internal network services to the outside world. It forwards tcp, udp, http(s), socks5 and other protocols, and comes with a full-featured web admin panel.

  71. 74

    k3s

    34.2Kk3s-io/k3s · Go

    K3s is a lightweight, fully conformant, production-ready Kubernetes distribution packed into a single binary under 100 MB that runs with roughly half the memory of standard Kubernetes.

  72. 75

    serenity

    33.9KSerenityOS/serenity · C++

    SerenityOS is a graphical Unix-like operating system for 64-bit x86, Arm, and RISC-V computers, built entirely from scratch.

  73. 76

    glances

    33.8Knicolargo/glances · Python

    Glances is an open-source cross-platform system monitoring tool, a top/htop alternative that shows CPU, memory, disk, network, containers, sensors, and running processes in one dashboard, reachable via terminal, web UI, API, or an MCP server for AI assistants.

  74. 77

    anoma

    33.6Kanoma/anoma · Elixir

    Anoma is the reference implementation of the Anoma protocol - a distributed, peer-to-peer system combining blockchain-style consensus and cryptography, written mainly in Elixir with a Rust component.

  75. 78

    shadowsocks

    33.5Kshadowsocks/shadowsocks · Python

    An encrypted SOCKS5 proxy for getting private traffic past censorship — that is what the repo's own tags (proxy, socks5, encryption, censorship) describe. It is written in Python, has been on GitHub since April 2012, and holds about 33.5k stars.

  76. 79

    XX-Net

    33.4KXX-net/XX-Net · Python

    XX-Net is a proxy tool built to bypass the Great Firewall (GFW) and internet censorship — a circumvention system the author says has run continuously for 9 years.

  77. 80

    tokio

    33.4Ktokio-rs/tokio · Rust

    Tokio is a runtime for writing reliable, asynchronous applications with Rust: it supplies the scheduling, non-blocking I/O, networking and timers that async Rust programs need.

  78. 81

    AFNetworking

    33.3KAFNetworking/AFNetworking · Objective-C

    A delightful networking library for iOS, macOS, watchOS and tvOS, built on the Foundation URL Loading System. Deprecated since January 2023 - the repo remains online as an archive.

  79. 82

    certbot

    33.3Kcertbot/certbot · Python

    Certbot is EFF's command-line tool that automatically fetches a free TLS certificate from Let's Encrypt and deploys it to your web server to enable HTTPS, and it can also work with any other certificate authority that speaks the ACME protocol.

  80. 83

    ShadowsocksX-NG

    32.9Kshadowsocks/ShadowsocksX-NG · Swift

    It's the next generation of ShadowsocksX — a macOS GUI client for the Shadowsocks proxy. You add your server profiles, and it routes your Mac's traffic through them via a local proxy.

  81. 84

    WindTerm

    32.5KkingToolbox/WindTerm · C

    WindTerm is a free professional SSH/Telnet/Serial/Shell/Sftp client and terminal built for DevOps, combining remote connections, a local shell and file transfer in one application.

  82. 85

    TrackersListCollection

    32.3KXIU2/TrackersListCollection

    A continuously updated collection of public BitTorrent tracker URLs, split into several text files (best, all, HTTP-only, HTTP-free) that you paste into any BT client to speed up downloads.

  83. 86

    linera-protocol

    32.1Klinera-io/linera-protocol · Rust

    Linera is a decentralized blockchain infrastructure built for highly scalable, secure, low-latency Web3 applications, using a microchain architecture where each user can own their own chain.

  84. 87

    nginx

    31.9Knginx/nginx · C

    NGINX ('engine x') is a free, open source web server, load balancer, reverse proxy, API gateway and content cache — described as the world's most popular web server.

  85. 88

    How-To-Secure-A-Linux-Server

    31.8Kimthenachoman/How-To-Secure-A-Linux-Server

    This is a long-form, evolving how-to guide (written as a GitHub README) that walks you through hardening a self-hosted Linux server, step by step, from SSH to firewalls to intrusion detection.

  86. 89

    lede

    31.6Kcoolsnowwolf/lede · C

    Lean's LEDE source: a hugely popular OpenWrt/LEDE fork for building your own router firmware, extended with support for domestic Chinese CPUs like Loongson loongarch64 and Phytium Tengrui D2000.

  87. 90

    Shadowrocket-ADBlock-Rules-Forever

    31.3KJohnshall/Shadowrocket-ADBlock-Rules-Forever

    A set of ready-made rule files for the iOS proxy app Shadowrocket: each file tells Shadowrocket which sites to connect to directly and which to route through your proxy, while filtering ads.

  88. 91

    openssl

    31Kopenssl/openssl · C

    OpenSSL is an open source toolkit for TLS, DTLS and QUIC, built on a full-strength general purpose cryptographic library you can also use on its own. It descends from the SSLeay library by Eric Young and Tim Hudson.

  89. 92

    algo

    30.4Ktrailofbits/algo · Python

    A set of Ansible scripts that spins up your own personal WireGuard and IPsec VPN server on a cloud provider, using the most secure defaults available.

  90. 93

    consul

    30.1Khashicorp/consul · Go

    Consul is a distributed, highly available, data center aware solution for connecting and configuring applications across dynamic, distributed infrastructure. It is built to be datacenter aware and can support any number of regions without complex configuration.

  91. 94

    netbird

    30Knetbirdio/netbird · Go

    NetBird is an open-source Zero Trust networking platform: it builds a configuration-free peer-to-peer WireGuard overlay network with centralized access control, so you can create secure private networks without open ports, complex firewall rules or VPN gateways.

  92. 95

    GitHub520

    30K521xueweihan/GitHub520 · Python

    GitHub520 publishes an up-to-date hosts file that maps GitHub's domains to fast, working IPs, fixing the broken images and slow loading that many users hit when browsing GitHub. It requires no software installation - you just update your system's hosts entries.

  93. 96

    90DaysOfDevOps

    29.8KMichaelCade/90DaysOfDevOps · Shell

    A structured learning curriculum for DevOps that grew out of a personal 90-day public learning challenge, now covering principles, processes, tooling, and real-world use cases like Kubernetes, Terraform, and Ansible.

  94. 97

    ProxmoxVE

    29.8Kcommunity-scripts/ProxmoxVE · Shell

    A community-maintained set of one-command install scripts for Proxmox VE: paste a single line into your Proxmox shell and it sets up a popular self-hosted service as a ready container or VM.

  95. 98

    deskflow

    29.8Kdeskflow/deskflow · C++

    A free, open-source app that lets the keyboard, mouse, or trackpad of one computer control several nearby computers, moving seamlessly between them — like a software KVM but without the video.

  96. 99

    v2ray

    29.7K233boy/v2ray · Shell

    A one-click install and management script for V2Ray proxy servers, letting you set up and run multiple VMess, VLESS, Trojan and Shadowsocks configurations on your own Linux server through a single command-line tool.

  97. 100

    CloudflareSpeedTest

    29.5KXIU2/CloudflareSpeedTest · Go

    A command-line tool that tests Cloudflare CDN latency and download speed to find the fastest IPs (IPv4 + IPv6) for your connection. It also supports other CDNs and sites that resolve to multiple IPs.

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