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American technology company
Cloudflare, Inc., is an American technology company headquartered in San Francisco, California, that provides a range of internet services, including content
Cloudflare
Free DNS service maintained by Cloudflare in partnership with APNIC
1 is a free Domain Name System (DNS) service by the American company Cloudflare that was started in a partnership with APNIC. The service functions as
1.1.1.1
occurred". Cloudflare. August 6, 2025. "Error 525: SSL handshake failed". Cloudflare. April 29, 2025. "Cloudflare support docs". developers.cloudflare.com.
List_of_HTTP_status_codes
Random number generator
of entropy sourcing. The concept was later revived and popularized by Cloudflare, which uses a wall of lava lamps in its office lobby as one component
Lavarand
Content delivery network for web resources
open-source software (FOSS) content delivery network (CDN) hosted by Cloudflare. As of May 2021, it serves 4,013 JavaScript and CSS libraries, which are
Cdnjs
Web forum
services to Kiwi Farms. In September 2022, Kiwi Farms was blocked by Cloudflare due to "an imminent and emergency threat to human life". Following intermittent
Kiwi_Farms
Open-source fast-loading HTML framework/api
help webpages load faster. AMP content may be cached by a CDN, such as Cloudflare's AMP caches, which allows pages to be served more quickly. AMP was first
Accelerated_Mobile_Pages
Type of cyber-attack
Services experienced an attack with a peak volume of 2.3 Tb/s. In July 2021, Cloudflare boasted of protecting its client from a DDoS attack from a global Mirai
Denial-of-service_attack
American business executive (born 1974)
executive chairman, and chief executive officer of the technology company Cloudflare. With a net worth of US$5.5 billion as of February 2025,[update] Prince
Matthew_Prince
Test to determine whether a user is human
CAPTCHA services are Google's reCAPTCHA and Intuition Machines' hCaptcha. Cloudflare, a major website security service provider, reported in 2021 that it takes
CAPTCHA
HTTP network protocol introduced in 2022
packages of nginx with HTTP/3 support have been released in February 2023. Cloudflare distributes a patch for nginx that integrates the quiche HTTP/3 library
HTTP/3
Shadow library search engine
site initially used Cloudflare's free tier as an additional caching and DDoS protection layer, taking advantage of Cloudflare's legal position that it
Anna's_Archive
Internet ecosystem layer that addresses bottlenecks
optimization. Content delivery service providers include Akamai Technologies, Cloudflare, Amazon CloudFront, Qwilt (Cisco), Fastly, CDN77, BunnyCDN, EdgeNext,
Content_delivery_network
Imageboard website
off clearnet on August 5, 2019, when network infrastructure provider Cloudflare stopped providing their content delivery network (CDN) service. Voxility
8chan
Name resolver service for the Domain Name System
Cloudflare. Retrieved 2019-01-04. "The Nitty Gritty - Cloudflare Resolver". 24 January 2023. Cloudflare Inc (2018-03-31). "DNS over TLS - Cloudflare Resolver"
Public_recursive_name_server
Static site generator written in Go
migrated from WordPress to a Jamstack solution with Hugo in 2017, and Cloudflare, which switched its Developer Docs from Gatsby to Hugo in 2022. Hugo takes
Hugo_(software)
Protocol to run DNS queries over HTTPS
DNS, before DoH itself was standardized and widely deployed. Apple and Cloudflare subsequently deployed the technology in the context of DoH, as Oblivious
DNS_over_HTTPS
Consortium on random number generators
League currently include Arbitrand, Automata Network, ChainSafe, cLabs, Cloudflare, DIA Association, Emerald Onion, École Polytechnique Fédérale de Lausanne
League_of_Entropy
Content delivery network
jsDelivr is powered by other contenttdelivery network providers, including Cloudflare, Fastly and BunnyCDN, and switches to another provider if one is experiencing
JSDelivr
Cyberattack using mass login requests
Workers)". The Cloudflare Blog. Retrieved 12 May 2020. Ali, Junade (21 February 2018). "Validating Leaked Passwords with k-Anonymity". The Cloudflare Blog. Retrieved
Credential_stuffing
American cybersecurity professional (born 1968)
States Department of Justice, he worked as a CSO at Facebook, Uber and Cloudflare. Sullivan became known as the first corporate security executive criminally
Joe_Sullivan_(cybersecurity)
Spanish association football league
access to IP addresses belonging to Cloudflare within Spain in an effort to block piracy sites that were using Cloudflare's services. In February 2025, the
La_Liga
Ability to seamlessly add computer resources to a given node
as Google, Facebook, X, Amazon, Microsoft, IBM Cloud, Oracle Cloud, or Cloudflare.[citation needed] Companies like Ericsson, AMD, and Intel provide hyperscale
Hyperscale_computing
Option in Extension Mechanisms for DNS
self-serve web archiving tool Archive.today has expressed concern over Cloudflare 1.1.1.1 not passing the contents of this field on to the authoritative
EDNS_Client_Subnet
TLS extension to serve multiple HTTPS sites
submitted to the IESG evaluation by January 2024. In September 2023, Cloudflare started to support ECH for hosted domains. In September 2023, Chromium
Server_Name_Indication
Cryptographic protocols for securing data in transit
supported by server-side implementations including OpenSSL 3.5, BoringSSL and Cloudflare. In August 1986, the National Security Agency, the National Bureau of
Transport_Layer_Security
American artificial intelligence company
The New York Times. According to separate analyses by Wired and, later, Cloudflare, Perplexity uses undisclosed web crawlers with spoofed user-agent strings
Perplexity_AI
Canadian businesswoman (born 1979)
of American content delivery network provider and cybersecurity firm Cloudflare. Michelle Zatlyn was born in July 1979 in Prince Albert, Saskatchewan
Michelle_Zatlyn
British software engineer and writer
Directors at Cloudflare, where he previously served as the company's Chief Technology Officer until March 2025. Prior to joining Cloudflare, he co-founded
John_Graham-Cumming
Software used to access websites
Retrieved 21 March 2025. "Browser Market Share Report for 2024 Q1". Cloudflare Radar. Cloudflare, Inc. 3 May 2024. Archived from the original on 1 July 2025.
Web_browser
Spanish computer-security researcher and executive (born 1975)
Digital Officer between 2016 and 2025. In August 2025, Alonso joined Cloudflare as vice president and head of international development. Alonso is a frequent
Chema_Alonso
Digital archive by the Internet Archive
In September 2020, the Internet Archive announced a partnership with Cloudflare – an American content delivery network service provider – to automatically
Wayback_Machine
American information technology company
given the hackers full access to execute any commands on the network, and Cloudflare admitted that a similar hack by the group on that company's network provided
Okta,_Inc.
Open source web server and a reverse proxy server
web sites ranked nginx first with 33.8%. Apache was second at 26.4% and Cloudflare Server third at 23.4%. As of March 2020[update], Netcraft estimated that
Nginx
Chess tournament
team members experienced connectivity issues due to a global outage of Cloudflare servers; Russia and India were subsequently declared joint winners. The
FIDE Online Chess Olympiad 2020
FIDE_Online_Chess_Olympiad_2020
American artificial intelligence company
"Anthropic has acquired the dev tools startup used by OpenAI, Google, and Cloudflare". TechCrunch. Retrieved June 4, 2026. Metz, Rachel (May 8, 2026). "Anthropic
Anthropic
Hacker group
Darkode hacking forums and shared hosting with them. On April 30, 2016, Cloudflare published a blog post detailing how cyber criminals using this group's
Lizard_Squad
Connection between computers or programs
But What's In It For Partner Apps?". AdExchanger. "Cloudflare API v4 Documentation". cloudflare. 25 February 2020. Retrieved 27 February 2020. Liew,
API
Cybersecurity company acquired by Cloudflare
cybersecurity company based in Redwood City, California which was acquired by Cloudflare in April 2022. Area 1 was incorporated in 2013 by Oren Falkowitz, Blake
Area_1_Security
Arch Linux-based Linux distribution
of Dell Technologies Jack Dorsey, Head of Block Matthew Prince, CEO of Cloudflare Brendan Iribe, cofounder of Scaleform and Oculus VR Jason Fried, CEO of
Omarchy
Reserved Internet domain name
changed their name server and start of authority records to ones managed by Cloudflare. The website received another update on September 28, 2026, with the text
Example.com
Archived from the original on 2013-04-25. Retrieved 2013-08-06. "Cloudflare Network". "Cloudflare DNSSEC Protection". "DigitalOcean API reference". "Dyn API
List_of_managed_DNS_providers
2024 Mass uprising in Bangladesh
from the original on 20 July 2024. Retrieved 20 July 2024. Cloudflare Radar [@CloudflareRadar] (19 July 2024). "Bangladesh is experiencing a near complete
Timeline_of_the_July_Uprising
Mail sent using electronic means
Retrieved May 27, 2024. "When are email attachments safe to open?". Cloudflare. Retrieved May 27, 2024. Griffiths, James (May 2, 2020). "How a badly-coded
Internet outages in Bangladesh during 2024
protests". Al Jazeera. 28 July 2024. Retrieved 20 October 2024. Cloudflare Radar [@CloudflareRadar] (19 July 2024). "Bangladesh is experiencing a near complete
2024 Bangladesh internet blackouts
2024_Bangladesh_internet_blackouts
Russian messaging and e-commerce app
April 2026, Cloudflare labeled the domain Max.ru which is associated with the Max app as spyware. Max's press office stated that Cloudflare's classification
Max_(app)
Information technology slogan
1980s. In 2019, the content delivery network and DDoS mitigation company Cloudflare took the rights of the slogan by registering it. "The Network is the Computer"
The_Network_is_the_Computer
2021 software security vulnerability
Security Team. Affected commercial services include Amazon Web Services, Cloudflare, iCloud, Minecraft: Java Edition, Steam, Tencent QQ and many others. According
Log4Shell
Application layer protocol
versions of the protocol. In 2019, support for HTTP/3 was first added to Cloudflare and Chrome and also enabled in Firefox. HTTP/3 has lower latency for real-world
HTTP
American venture capital firm
Zynga, Tumblr, Stack Overflow, Meetup, Kickstarter, MongoDB, Flurry, Cloudflare, Duolingo, Soundcloud, Clue, and Carta. Union Square Ventures (USV) was
Union_Square_Ventures
Artificial intelligence coding agent
multiple artificial intelligence providers through a single API. In 2026, Cloudflare used OpenCode with Anthropic's Claude while developing Vinext, an experimental
OpenCode
Agency of the United States Department of Homeland Security
2021, CISA removed the fee for registering domains. In January 2023, Cloudflare received a $7.2M contract to provide DNS registry and hosting services
Cybersecurity and Infrastructure Security Agency
Cybersecurity_and_Infrastructure_Security_Agency
Content-addressable, peer-to-peer hypermedia distribution protocol
distributed through Cloudflare's IPFS gateway since July 2018. The phishing scam HTML is stored on IPFS, and displayed via Cloudflare's gateway. The connection
InterPlanetary_File_System
Web browser developed by Google
Google Chrome had 71% worldwide global usage share, and, according to Cloudflare, it was 68%, making it the most widely used web browser.[citation needed]
Google_Chrome
Type of cryptographic certificate
handshake. It is currently an IETF Internet Draft, and has been in use by Cloudflare and Facebook, with browser support by Firefox. Modern websites and other
Delegated_credential
Type of proxy server
back-end services themselves remain healthy. For example, a 2020 outage at Cloudflare briefly took down major sites and services that relied on its reverse-proxy
Reverse_proxy
File sharing website focused on East Asian media
download a "free binary client". In April 2018, Cloudflare terminated its services to Nyaa. According to Cloudflare, "The pirate site tried to interfere with
Nyaa_Torrents
Denial-of-service attack
Force. "Hyper-volumetric DDoS attacks skyrocket: Cloudflare's 2025 Q2 DDoS threat report". The Cloudflare Blog. 2025-07-15. Retrieved 2026-02-21. Kurose
SYN_flood
IETF network protocol
RFC 9458, published in January 2024 by authors affiliated with Mozilla and Cloudflare. The RFC says "Oblivious HTTP is simpler and less costly than more robust
Oblivious_HTTP
Public recursive DNS resolver based in Switzerland
Quad9 VS Cloudflare VS DNS Filter VS OpenDNS. lawrencesystems.com. Lawrence Systems. Retrieved 2021-05-27. Quad9: 97.16% effective, Cloudflare: 56.74%
Quad9
Raster graphics file format
Greg (15 September 2021). "Optimizing images on the web". The Cloudflare Blog. Cloudflare. Retrieved 3 December 2025. "Netflix AV1 Encodes Readme". Archived
AVIF
System of public logs of digital certificates
Monitoring". Cloudflare Developers. 2024. Retrieved 2025-05-07. "Sectigo's monitor". crt.sh. Retrieved 28 April 2025. "Cloudflare's Monitor". Cloudflare. 2024
Certificate_Transparency
Russian technology company
experiments conducted. CatBoost is used by JetBrains for code completion, CloudFlare for bot detection, and Careem for trip-distance determination. In 2012
Yandex
Network level ad- and tracker-blocking app
over HTTPS for devices using it as a DNS server with the cloudflared binary provided by Cloudflare. Pi-hole can handle all DNS requests for the local network
Pi-hole
Security bug affecting Cloudflare
Cloudbleed was a Cloudflare buffer overflow disclosed by Project Zero on February 17, 2017. Cloudflare's code disclosed the contents of memory that contained
Cloudbleed
Former online illegal movie streaming site network
numerous steps to hide the identity of the operator, including using Cloudflare, but there is strong reason to believe the operator is still in Vietnam;
123Movies
Network protocol used by the Web
quite yet". CloudFlare. Retrieved December 5, 2015. Krasnov, Vlad (April 28, 2016). "Announcing Support for HTTP/2 Server Push". CloudFlare. Retrieved
HTTP/2
Open-source analytical query engine
Retrieved 2026-03-22. "Cloudflare Log Explorer is now GA, providing native observability and forensics". The Cloudflare Blog. Cloudflare. 2025-06-18. Retrieved
Apache_DataFusion
Scientific research paper file sharing website
Sci-Hub domains had been rendered inactive by the court order and its CloudFlare account was terminated. Since 2018, the White House Office of the U.S
Sci-Hub
Data format and compression library
improvements to this library: Intel has a high-performance fork of zlib. Cloudflare maintains a high-performance fork with "massive" improvements. zlib-ng
Zlib
Open-source web server software
17.83% of the million busiest websites, with the other top four being Cloudflare at 22.99%, nginx at 20.11%, and Microsoft Internet Information Services
Apache_HTTP_Server
Low-quality AI-generated digital content
maint: deprecated archival service (link) "Age-Gating the Internet + Cloudflare Takes On A.I. Scrapers + HatGPT". The New York Times. 1 August 2025. Retrieved
AI_slop
Computer software that distributes web pages
Choi (24 August 2020). "Delivering HTTP/2 upload speed improvements". Cloudflare. Archived from the original on 16 November 2021. Retrieved 15 November
Web_server
Security analysis team employed by Google
hardware community. On 19 February 2017, Google discovered a flaw within Cloudflare's reverse proxies, which caused their edge servers to run past the end
Project_Zero
Method of extracting data from websites
3 September 1995. Retrieved June 23, 2025. page, Peter Hallarchive. "Cloudflare will now, by default, block AI bots from crawling its clients' websites"
Web_scraping
Topics referred to by the same term
Tenet, a device that inverts entropy Turnstile, a CAPTCHA product by Cloudflare Turn Style, retail store Turnstyle (band), a band from Perth, Western
Turnstile_(disambiguation)
Web server based on nginx and LuaJIT
originally sponsored by Taobao before 2011 and was mainly supported by Cloudflare from 2012 to 2016. Since 2017, it has been mainly supported by OpenResty
OpenResty
Digital media metadata specification for provenance and authenticity
content provenance by integrating Content Credentials into Cloudflare Images". Cloudflare Blog. Retrieved 2026-09-07. Sherry, James (2025-08-12). "Trust
Content_Credentials
Multimedia delivery method
Slate. ISSN 1091-2339. Retrieved 5 May 2024. "What is live streaming?". Cloudflare. Gelman, A.D.; Halfin, S.; Willinger, W. (1991). "On buffer requirements
Streaming_media
CAPTCHA implementation owned by Google
it allows Google to track users on non-Google websites. In April 2020, Cloudflare switched from reCAPTCHA to Intuition Machines' hCaptcha service, citing
ReCAPTCHA
Type of resource record in the Domain Name System (DNS)
BIG-IP DNS Yes OVH DNS Yes DNS.com 51DNS DNS No Citrix Systems NetScaler GSLB Yes Cloudflare Cloudflare Authoritative DNS Yes Yandex Cloud Сloud DNS No
NAPTR_record
Biennial international chess tournament
several Indian team members experienced connectivity issues due to a Cloudflare outage. § The 2022 event was originally planned to be held in Minsk, Belarus
Chess_Olympiad
Black-hat criminal hacker group
impacted organizations. Public disclosures tied to this campaign include Cloudflare, Workiva, Zscaler, Tenable, CyberArk, Elastic, BeyondTrust, Proofpoint
ShinyHunters
Defunct social networking site for sex workers
server. After 3 weeks of operation, it was publicly unavailable following Cloudflare withdrawing their services to Switter on 18 April 2018, after the passage
Switter
Open-source web browser
the browser. The initiative is funded entirely through donations, with Cloudflare, FUTO, Shopify, Proton and 37signals among its sponsors. Originally created
Ladybird_(web_browser)
Principal protocol used to stream data across an IP network
Ghedini, Alessandro (26 July 2018). "The Road to QUIC". The Cloudflare Blog. Cloudflare. Gurtov, Andrei; Floyd, Sally (February 2004). Resolving Acknowledgment
Transmission_Control_Protocol
File-sharing website for publications
injunction compelling the gateway providers IPFS, Pinata Technologies and Cloudflare to deny services to Library Genesis. On September 26, 2024, a US judge
Library_Genesis
American alt-tech social media platform
Jun 21, 2022: Application traffic interrupted by Cloudflare outage [...] There appears to be a Cloudflare outage affecting Truth Social (web and mobile)
Truth_Social
The address is only for whistleblowing via Securedrop. 1.1.1.1 – DNS by Cloudflare Mullvad – VPN provider based in Sweden Cryptostorm – VPN provider based
List_of_Tor_onion_services
Network protocol
to saturate links, causing the denial of services. The network company Cloudflare has described this attack as the "Stupidly Simple DDoS Protocol". Firefox
Simple Service Discovery Protocol
Simple_Service_Discovery_Protocol
Overview of resource records permissible in zone files of the Domain Name System
2535." RFC 2845, abstract "What happened next: the deprecation of ANY". Cloudflare. 16 March 2019. Retrieved 19 September 2021. P. Mockapetris (November
List_of_DNS_record_types
Online subculture
September 2019, but is still home to some identifying as incels) and Twitter. Cloudflare, which provides services including DDoS protection, caching and obsfucation
Incel
High performance packet data path in the OS kernel
Community Resources L4Drop: XDP DDoS Mitigations, Cloudflare Unimog: Cloudflare's edge load balancer, Cloudflare Open-sourcing Katran, a scalable network load
Express_Data_Path
Content delivery network
basis. CloudFront competes with larger CDNs, such as Akamai, Azion, and Cloudflare. Upon launch, Larry Dignan of ZDNet News stated that CloudFront could
Amazon_CloudFront
File indicating parts for web crawling
New Ones)". 404 Media. Retrieved 2024-07-29. "Bot Directory". Cloudflare Radar. Cloudflare. Retrieved 2 August 2026.{{cite web}}: CS1 maint: url-status
Robots.txt
Website providing torrent files and magnet links
(Moldo-German company) servers. The Pirate Bay then began using the services of CloudFlare, a company which offers reverse proxy services. On 1 January 2015, the
The_Pirate_Bay
over IP protocol targeted at gamers[citation needed] 8787 Unofficial Cloudflare Workers development default 8834 Unofficial Nessus, a vulnerability scanner
List of TCP and UDP port numbers
List_of_TCP_and_UDP_port_numbers
2024 mass uprising in Bangladesh
from the original on 20 July 2024. Retrieved 20 July 2024. Cloudflare Radar [@CloudflareRadar] (19 July 2024). "Bangladesh is experiencing a near complete
July_Uprising
Authenticated encryption with associated data algorithm
in RFC 7634 to be used in IPsec. The same year, it was integrated by Cloudflare as an alternative ciphersuite. In 2016 RFC 7905 describes how to use it
ChaCha20-Poly1305
Free and open-source anonymity network based on onion routing
Prince, Matthew (30 March 2016). "The Trouble with Tor". The Cloudflare Blog. Cloudflare. Retrieved 26 September 2024. Greenberg, Andy (7 November 2014)
Tor_(network)
travel, tourism, insurance
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