A free Argo Tunnel for your next project
June 15, 2019
Argo Tunnel lets you expose a server to the Internet without opening any ports. The service runs a lightweight process on your server that creates outbound tunnels to the Cloudflare network. ...
Protecting Project Galileo websites from HTTP attacks
June 13, 2019
Yesterday, we celebrated the fifth anniversary of Project Galileo. More than 550 websites are part of this program, and they have something in common: each and every one of them has been subject to attacks in the last month....
Technology's Promise - Highlights from DEF CON China 1.0
June 05, 2019
Themed "Technology's Promise", DEF CON China 1.0 kicked off on 5/30 in Beijing. The Cloudflare team from Beijing, Singapore and San Francisco attended to connect with local security communities....
Stopping SharePoint’s CVE-2019-0604
May 28, 2019
On Saturday, 11th May 2019, we got the news of a critical web vulnerability being actively exploited in the wild by advanced persistent threats (APTs), affecting Microsoft’s SharePoint server (versions 2010 through 2019)....
Preventing Request Loops Using CDN-Loop
March 20, 2019
HTTP requests originate with a client and end at a web server that processes the request and returns a response. Such requests pass through multiple proxies before arriving at the requested resource. ...
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March 15, 2019
RFC8482 - Saying goodbye to ANY
Ladies and gentlemen, I would like you to welcome the new shiny RFC8482, which effectively deprecates DNS ANY query type. DNS ANY was a "meta-query" - think about it as a similar thing to the common A, AAAA, MX or SRV query types, but unlike these it wasn't a real query type - it...
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March 05, 2019
Stopping Drupal’s SA-CORE-2019-003 Vulnerability
Drupal discovered a severe vulnerability and said they would release a patch. When the patch was released we analysed and created rules to mitigate these. By analysing the patch we created WAF rules to protect Cloudflare customers running Drupal....
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March 04, 2019
Building fast interpreters in Rust
In the previous post we described the Firewall Rules architecture and how the different components are integrated together. We created a configurable Rust library for writing and executing Wireshark®-like filters in different parts of our stack written in Go, Lua, C, C++ and Java...
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March 04, 2019
How we made Firewall Rules
Recently we launched Firewall Rules, a new feature that allows you to construct expressions that perform complex matching against HTTP requests and then choose how that traffic is handled....
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February 24, 2019
Cloudflare’s RPKI Toolkit
A few months ago, we made a first then a second announcement about Cloudflare’s involvement in Resource Public Key Infrastructure (RPKI), and our desire to make BGP Internet routing more secure....
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February 22, 2019
Cloudflare Registrar at three months
We’re excited to make Cloudflare Registrar available to all of our customers and we’d like to share some insights and data about domain registration that we learned during the early access period....
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February 21, 2019
Cloudflare Access now supports RDP
Last fall, the United States FBI warned organizations of an increase in attacks that exploit vulnerabilities in the Remote Desktop Protocol (RDP). Attackers stole sensitive data and compromised networks by taking advantage of desktops left unprotected....
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February 20, 2019
Stop the Bots: Practical Lessons in Machine Learning
Bot-powered credential stuffing is a scourge on the modern Internet. These attacks attempt to log into and take over a user’s account by assaulting password forms with a barrage of dictionary words and previously stolen account credentials....
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February 18, 2019
SOCKMAP - TCP splicing of the future
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February 07, 2019
Give your automated services credentials with Access service tokens
Cloudflare Access secures your internal sites by adding authentication. When a request is made to a site behind Access, Cloudflare asks the visitor to login with your identity provider....
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February 05, 2019
Cloudflare Support for Azure Customers
Cloudflare seeks to help its end customers use whichever public and private clouds best suit their needs. Towards that goal, we have been working to make sure our solutions work well with various public cloud providers including Microsoft’s Azure platform....
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January 24, 2019
HTTP/3: From root to tip
Explore HTTP/3 from root to tip and discover the backstory of this new HTTP syntax that works on top of the IETF QUIC transport....
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January 23, 2019
Tracing Soon-to-Expire Federal .gov Certificates with CT Monitors
As of December 22, 2018, parts of the US Government have “shut down” because of a lapse in appropriation. ...
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January 16, 2019
One-Click DNSSEC with Cloudflare Registrar
When you launch a domain, you rely on the Domain Name System to direct your users to your site. However, DNS can't guarantee that visitors reach your content because basic DNS lacks authentication....
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