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An introduction to JavaScript-based DDoS
CloudFlare protects millions of websites from online threats. One of the oldest and most pervasive attacks launched against websites is the Distributed Denial of Service (DDoS) attack. In a typical...
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Redesigning CloudFlare
CloudFlare’s original interface grew at an amazing speed. Visually, it hadn't changed much since CloudFlare’s launch in 2010. After several years of new features, settings, and ancillary UIs buried...
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Go crypto: bridging the performance gap
It is no secret that we at CloudFlare love Go. We use it, and we use it a LOT. There are many things to love about Go, but what I personally find appealing is the ability to write assembly code! CC BY...
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Google PageSpeed Service customers: migrate to CloudFlare for acceleration
This week, Google announced that its hosted PageSpeed Service will be shut down. Everyone using the hosted service needs to move their site elsewhere before August 3 2015 to avoid breaking their...
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CloudFlare "Interview Questions"
For quite some time we've been grilling our candidates about dirty corners of TCP/IP stack. Every engineer here must prove his/her comprehensive understanding of the full network stack. For example:...
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CloudFlare Supports the Passage of the USA Freedom Act
Earlier today, the lower house in the U.S. Congress (the House of Representatives) passed the USA FREEDOM Act. The Act, if passed by the Senate and signed by the President, would seek to sunset the...
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Logjam: the latest TLS vulnerability explained
Image: "Logjam" as interpreted by @0xabad1dea. Yesterday, a group from INRIA, Microsoft Research, Johns Hopkins, the University of Michigan, and the University of Pennsylvania published a deep...
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Welcome Acquia!
We’ve had the good fortune to share many great experiences with the Acquia team over the last few years. From breaking bread with founder and CTO Dries Buytaert at SXSW, to skiing the slopes of Park...
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Four years later and CloudFlare is still doing IPv6 automatically
Over the past four years CloudFlare has helped well over two million websites join the modern web, making us one of the fastest growing providers of IPv6 web connectivity on the Internet. CloudFlare's...
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iOS Developers — Migrate to iOS 9 with CloudFlare
Thousands of developers use CloudFlare to accelerate and secure the backend of their mobile applications and websites. This week is Apple’s Worldwide Developers Conference (WWDC), where thousands of...
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How to receive a million packets per second
Last week during a casual conversation I overheard a colleague saying: "The Linux network stack is slow! You can't expect it to do more than 50 thousand packets per second per core!" That got me...
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Go has a debugger—and it's awesome!
Something that often, uh... bugs1 Go developers is the lack of a proper debugger. Sure, builds are ridiculously fast and easy, and println(hex.Dump(b)) is your friend, but sometimes it would be nice to...
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EFF, CloudFlare Ask Federal Court Not To Force Internet Companies To Enforce...
This blog was originally posted by the Electronic Frontier Foundation who is represents CloudFlare in this case. JUNE 18, 2015 | BY MITCH STOLTZ This month, CloudFlare and EFF pushed back against major...
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Osaka, Japan: CloudFlare's 35th data center
Move over Jurassic World, the long awaited sequel to our Tokyo deployment is here. Our Osaka data center is our 2nd in Japan, 5th in Asia (following deployments in Hong Kong, Tokyo, Singapore, and...
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How to build your own public key infrastructure
A major part of securing a network as geographically diverse as CloudFlare’s is protecting data as it travels between datacenters. Customer data and logs are important to protect but so is all the...
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Check out these brand new videos on how to optimize CloudFlare
Someone once said that the best things in life are free and I can’t agree more. I want to draw the attention of the CloudFlare community to a great resource that helps maximize the value of our...
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How to achieve low latency with 10Gbps Ethernet
Good morning! In a recent blog post we explained how to tweak a simple UDP application to maximize throughput. This time we are going to optimize our UDP application for latency. Fighting with latency...
View ArticleSetting Go variables from the outside
CloudFlare's DNS server, RRDNS, is written in Go and the DNS team used to generate a file called version.go in our Makefile. version.go looked something like this: // THIS FILE IS AUTOGENERATED BY THE...
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Welcome UK2 Group!
Today we are thrilled to welcome UK2 Group as a CloudFlare partner. Customers of UK2 Group (including its brands UK2.net, Midphase, and Westhost) are now able to access CloudFlare’s web performance...
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Blue Light Special: Ensuring fast global configuration changes
CloudFlare operates a huge global network of servers that proxy our customers' web sites, operate as caches, inspect requests to ensure they are not malicious, deflect DDoS attacks and handle one of...
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