Killing RC4: The Long Goodbye
2014-05-07
At CloudFlare we spend a lot of time thinking about the best way to keep our customers’ data safe. Despite recent troubles, HTTPS is still the best way to deliver encrypted content for the web. ...
Tracking our SSL configuration
2014-05-03
Over time we've updated the SSL configuration we use for serving HTTPS as the security landscape has changed. In the past we've documented those changes in blog posts....
Searching for The Prime Suspect: How Heartbleed Leaked Private Keys
2014-04-27
Within a few hours of CloudFlare launching its Heartbleed Challenge the truth was out. Not only did Heartbleed leak private session information (such as cookies and other data that SSL should have been protecting), but the crown jewels of an HTTPS web server were also vulnerable....
Upcoming Meetups at CloudFlare
2014-04-21
At CloudFlare, we love connecting with our communities, and so we are excited to announce two meetups to be hosted here at the CloudFlare headquarters in San Francisco next month....
The Hidden Costs of Heartbleed
2014-04-17
A quick followup to our last blog post on our decision to reissue and revoke all of CloudFlare's customers' SSL certificates. One question we've received is why we didn't just reissue and revoke all SSL certificates as soon as we got word about the Heartbleed vulnerability?...
The Heartbleed Aftermath: all CloudFlare certificates revoked and reissued
2014-04-17
Eleven days ago the Heartbleed vulnerability was publicly announced. Last Friday, we issued the CloudFlare Challenge: Heartbleed and simultaneously started the process of revoking and reissuing all the SSL certificates....
Certificate Revocation and Heartbleed
2014-04-12
As you may have noticed, the CloudFlare Heartbleed Challenge has been solved. The private key for the site cloudflarechallenge.com has been obtained by several authorized attackers via the Heartbleed exploit....
The Results of the CloudFlare Challenge
2014-04-11
Earlier today we announced the Heartbleed Challenge. We set up a nginx server with a vulnerable version of OpenSSL and challenged the community to steal its private key....
Answering the Critical Question: Can You Get Private SSL Keys Using Heartbleed?
2014-04-11
Below is what we thought as of 12:27pm UTC. To verify our belief we crowd sourced the investigation. It turns out we were wrong. While it takes effort, it is possible to extract private SSL keys....
Jetpack for WordPress: automatic protection
2014-04-10
As we've said before, lots of our users run WordPress on their websites and its popularity makes it a big target. So when a new vulnerability is discovered, acting quickly is prudent....
Staying ahead of OpenSSL vulnerabilities
2014-04-07
Today a new vulnerability was announced in OpenSSL 1.0.1 that allows an attacker to reveal up to 64kB of memory to a connected client or server (CVE-2014-0160). We fixed this vulnerability last week before it was made public. ...
Introducing CNAME Flattening: RFC-Compliant CNAMEs at a Domain's Root
2014-04-03
This post is about a new feature we've been quietly rolling out over the last few months. Last week we began enabling it for everyone by default. ...
The weird and wonderful world of DNS LOC records
2014-04-01
A cornerstone of CloudFlare's infrastructure is our ability to serve DNS requests quickly and handle DNS attacks. To do both those things we wrote our own authoritative DNS server called RRDNS in Go. ...
How to ensure your server's software stays secure?
2014-03-17
At CloudFlare, security is on the top of our minds. We are always looking for ways to better secure the data we are entrusted with and improve the security of our customers' websites. ...
I joined CloudFlare on Monday along with 5,000 others
2014-03-13
There are days when you feel quite ecstatic and know you have succeeded in completing each and every task set before you. Monday was one of those days - well nearly....
What do you do when the world’s attention is on you?
2014-03-12
This is a guest post from Rodney Gibbs. Rodney is the CIO of The Texas Tribune, a nonprofit media organization that covers public policy, politics, and government. ...
WordPress Pingback Attacks and our WAF
2014-03-11
At CloudFlare a lot of our customers use WordPress, that's why we have our own plugin, we hang out at WordCamp and we wrote a WordPress specific ruleset for our Web Application Firewall....
ECDSA: The digital signature algorithm of a better internet
2014-03-10
This blog post is dedicated to the memory of Dr. Scott Vanstone, popularizer of elliptic curve cryptography and inventor of the ECDSA algorithm. He passed away on March 2, 2014....
It's Go Time on Linux
2014-03-05
Some interesting changes related to timekeeping in the upcoming Go 1.3 release inspired us to take a closer look at how Go programs keep time with the help of the Linux kernel. Timekeeping is a complex topic and determining the current time isn’t as simple as it might seem at first glance....
