This is strictly a violation of the TCP specification

I was asked to debug another weird issue on our network. Apparently every now and then a connection going through CloudFlare would time out with 522 HTTP error.

CC BY 2.0 image by Chris Combe

522 error on CloudFlare indicates a connection issue between our edge server and the origin server. Most often the blame is on the origin server side - the origin server is slow, offline or encountering high packet loss. Less often the problem is on our side.

In the case I was debugging it was neither. The internet connectivity between CloudFlare and origin was perfect. No packet loss, flat latency. So why did we see a 522 error?

The root cause of this issue was pretty complex. Afterred long debugging we identified an important symptom: sometimes, once in thousands of runs, our test program failed to establish a connection between two daemons on the same machine. To be precise, an NGINX instance was trying to establish a TCP connection to our internal acceleration service on localhost. This failed with a timeout error.

Once we knew what to look for we were able to reproduce this with good old netcat. After a couple of dozen of Continue reading

IDG Contributor Network: Cybersecurity skills crisis creating vulnerabilities

Cybersecurity staffing continues to be a problem, a new report has found. Intel Security says a massive 82 percent of IT professionals that it surveyed are battling a shortage in workers specializing in cybersecurity.It’s proving to be a major deficit and is resulting in serious damage. Australia, France, Germany, Israel, Japan, Mexico, U.S. and U.K. are all hurting for hires, the study says.Market research specialist Vanson Bourne performed the survey and interviewed IT decision makers working in cybersecurity in developed countries.+ Also on Network World: Closing the cybersecurity talent gap, one woman at a time +To read this article in full or to leave a comment, please click here

Pakistan cybercrime law scares by its vagueness

Pakistan’s National Assembly has passed a cybercrime bill that provides for censorship of the internet and could also be misused by the vagueness of some of its provisions.Section 34 of the new Prevention of Electronic Crimes Act gives authorities the power to remove or block access to a variety of content.It provides for such action in “the interest of the glory of Islam or the integrity, security or defence of Pakistan or any part thereof, public order, decency or morality, or in relation to contempt of court or commission of or incitement to an offence under this Act, ” according to a copy of the bill on the website of the Digital Rights Foundation.To read this article in full or to leave a comment, please click here

Managing The IPv6 Transition In The Enterprise

Show 301 – Intent Driven Network Service Orchestration with Anuta NCX – Sponsored

Anuta Networks is announcing their NCX 5.0 release using YANG model driven architecture to deliver a vendor-neutral, extensible and scalable platform. The post Show 301 – Intent Driven Network Service Orchestration with Anuta NCX – Sponsored appeared first on Packet Pushers.

New compromises won’t end the fight between LTE-U and Wi-Fi

The Wi-Fi Alliance says it’s taken more steps toward compromise since backers of LTE-Unlicensed slammed a coexistence workshop that took place last week. But those moves haven’t brought about wireless peace just yet.LTE-U is a system for running LTE networks in some of the unlicensed frequencies used by Wi-Fi. The workshop, the latest of several intended to make sure LTE-U doesn’t unfairly interfere with Wi-Fi, brought together participants that want to use the new cellular system as well as those devoted to Wi-Fi.When it was done, the Alliance said a test for coexistence was on track for completion next month. However, LTE-U supporters, including Qualcomm, said the whole effort was technically unsound and biased against them.To read this article in full or to leave a comment, please click here

Here’s why Azure Stack will only run on certain hardware

Microsoft made a divisive announcement last month when it revealed that Azure Stack will be delayed until the middle of next year and that the private cloud software will only run on a set of integrated hardware systems rather than a wide variety of hardware. Now, the company is trying to explain that change to customers. On Thursday, Microsoft Principal Group Program Manager Vijay Tewari makes the case for shipping Azure Stack on a small variety of hardware in a video interview. His main point is this: constraining the software to a small set of hardware leads to a better product that's more useful right out of the gate.To read this article in full or to leave a comment, please click here

Here’s why Azure Stack will only run on certain hardware

Microsoft made a divisive announcement last month when it revealed that Azure Stack will be delayed until the middle of next year and that the private cloud software will only run on a set of integrated hardware systems rather than a wide variety of hardware. Now, the company is trying to explain that change to customers. On Thursday, Microsoft Principal Group Program Manager Vijay Tewari makes the case for shipping Azure Stack on a small variety of hardware in a video interview. His main point is this: constraining the software to a small set of hardware leads to a better product that's more useful right out of the gate.To read this article in full or to leave a comment, please click here

HPE Expands HPC Reach With SGI Buy

Supercomputer maker SGI has been going it alone in the upper echelons of the computing arena for decades and has brought much innovation to bear on some of the most intractable simulation, modeling, and analytics problems in the world. But the one thing it could never do was get enough feet on the street to sell its gear.

Now that Hewlett Packard Enterprise has acquired SGI, that will no longer be a problem, but the downside, as far as the variety in the IT ecosystem is concerned, is that yet another independent company will be subsumed into a much larger …

HPE Expands HPC Reach With SGI Buy was written by Timothy Prickett Morgan at The Next Platform.

Auto Renew Let’s Encrypt Certificates

I'm a big fan of Let's Encrypt (free, widely trusted SSL certificates) but not a big fan of most of the client software available for requesting and renewing certificates. Unlike a typical certificate authority, Let's Encrypt doesn't have a webui for requesting/renewing certs; everything is driven via an automated process that is run between a Let's Encrypt software client and the Let's Encrypt web service.

Since the protocols that Let's Encrypt uses are standards-based, there are many open source clients available. Being security conscious, I have a few concerns with most of the clients:

• Complication. Many of the clients are hundreds of lines long and unnecessarily complicated. This makes the code really hard to audit and since this code is playing with my crypto key material, I do want to audit it.
• Elevated privilege. At least one of the clients I saw required root permission. That's a non starter.

Technology Short Take #70

Welcome to Technology Short Take #70! In this post you’ll find a collection of links to articles discussing the major data center technologies—networking, hardware, security, cloud computing, applications, virtualization…you name it! (If there’s a topic you think I’m missing, I’d love to hear from you.)

Networking

• MTU in OpenStack Neutron has been, as this article by Sam Yaple points out, a bit of a touchy subject. Fortunately, it looks like progress has been made on that front, so check out Sam’s post for more details.
• Jason Edelman has an article from back in January that describes the use of Big Switch’s Big Cloud Fabric (BCF) and Big Monitoring Fabric (BMF) in conjunction with Ansible (via some Ansible modules that Jason himself developed).
• Dwayne Sinclair covers the basics of SpoofGuard in NSX, and how to interact with SpoofGuard via API, in this article.
• This article is a bit more OpenStack-focused, but given that it focuses pretty heavily on Neutron I thought it’d fit better here in the “Networking” section. The article talks about how to use the --allowed_address_pairs extension to build a highly-available proxy server instead of using LBaaS.
• Numan Siddique describes the native DHCP support available in OVN (Open Continue reading

VMworld 2016 Prayer Time

For the last couple of years, I’ve helped organize a gathering of Christians for a brief time of prayer while at VMworld. This year, I’d like to again offer fellow believers attending VMworld 2016 the same opportunity to gather together for a time of prayer before starting the day. If you’re interested in attending, here are the details.

What: A brief time of prayer

Where: Mandalay Bay Convention Center, level 1 (same level as the food court), at the bottom of the escalators heading upstairs

When: Monday 8/29 through Thursday 9/1 at 7:45am (this should give everyone enough time to grab breakfast before the keynotes start at 9am)

Who: All courteous attendees are welcome, but please note that this will be a distinctly Christian-focused and Christ-centric activity. (I encourage believers of other faiths/religions to organize equivalent activities.)

Why: To spend a few minutes in prayer over the day, the conference, and the attendees

As in previous years, there’s no need to RSVP or let me know that you’ll be there, although you’re welcome to do so if you’d like. There’s also no need to bring anything except an open heart and a willingness to display your faith in front Continue reading

Millions of Volkswagens can be broken into with a wireless hack

Millions of Volkswagens built over the past 20 years can be broken into with a hack that exploits the cars’ remote control key systems, security researchers have found. Most VWs built since 1995 use one of a handful of electronic “master keys” to remotely open and lock the doors, and those keys can be extracted by reverse engineering the firmware, the researchers wrote in a new paper.  That alone isn’t enough to break into a car -- the master key has to be combined with a unique code generated by each remote key device. But the researchers also devised a way to do that, assembling a piece of radio hardware costing around $40.To read this article in full or to leave a comment, please click here

Millions of Volkswagens can be broken into with a wireless hack

Millions of Volkswagens built over the past 20 years can be broken into with a hack that exploits the cars’ remote control key systems, security researchers have found. Most VWs built since 1995 use one of a handful of electronic “master keys” to remotely open and lock the doors, and those keys can be extracted by reverse engineering the firmware, the researchers wrote in a new paper.  That alone isn’t enough to break into a car -- the master key has to be combined with a unique code generated by each remote key device. But the researchers also devised a way to do that, assembling a piece of radio hardware costing around $40.To read this article in full or to leave a comment, please click here

HPE aims for a big-data boost with $275 million SGI buy

Hewlett Packard Enterprise is buying SGI in a $275 million deal that it hopes will give it a major boost in big-data analytics and high-performance computing.It's the latest surprise development at HPE, which has continued to make big changes since it was formed in the break-up of the old Hewlett-Packard last year.The deal to buy SGI, announced Thursday, fits with HPE's goal to expand its data analytics business. It will also make HPE a bigger player in high performance computing, a growing part of the server market. SGI has roughly 1,100 employees worldwide. On Thursday, it reported a net loss for its last fiscal year of $11 million, on revenue of $533 million.To read this article in full or to leave a comment, please click here

HPE aims for a big-data boost with $275 million SGI buy

Hewlett Packard Enterprise is buying SGI in a $275 million deal that it hopes will give it a major boost in big-data analytics and high-performance computing.It's the latest surprise development at HPE, which has continued to make big changes since it was formed in the break-up of the old Hewlett-Packard last year.The deal to buy SGI, announced Thursday, fits with HPE's goal to expand its data analytics business. It will also make HPE a bigger player in high performance computing, a growing part of the server market. SGI has roughly 1,100 employees worldwide. On Thursday, it reported a net loss for its last fiscal year of $11 million, on revenue of $533 million.To read this article in full or to leave a comment, please click here

24% off Acer Chromebook 15 CB5-571-C1DZ (15.6-Inch Full HD IPS, 4GB RAM, 16GB SSD) – Deal Alert

Acer's 15.6-inch Full HD Chromebook allows you to see more, do more and explore more than ever before. With a 27% larger screen area than the 13.3-inch Chromebook, and a 24% larger screen than a 14-inch Chromebook means more content can be shown and less scrolling and productivity tools such as Excel are easier to interact with.  The display is bright and crisp with a 1920 x 1080 Full HD resolution with wide viewing angle display, allowing you to share content simply and easily with those around you. It also has a high-dynamic-range imaging (HDR) web cam which provides clearer photos and supports better Google Hangouts experience in HD, The two full-sized upward facing speakers bring movies to life, give songs more depth and make games more engaging and immersive.To read this article in full or to leave a comment, please click here

32% off Pulse Solo Dimmable LED Light with Dual Channel Bluetooth Speakers – Deal Alert

Pulse Solo is the world's first LED light with dual speakers in one bulb. Pulse Solo combines the energy efficiency of a dimmable LED light with the high-quality audio of JBL Bluetooth speakers. Setup is easy, twist the Pulse Solo into any standard light socket, and adjust both lighting and sound from any Bluetooth enabled iOS or Android device. Experience the soaring highs and the rich stereo sound of JBL combined with warm, dimmable lighting, without the fuss of speaker wires, power cords, or an independent remote control. The intuitive iOS and Android App offers seamless control of both light and sound while listening to your favorite streamed music or media, offering you the ability to customize your light and music to suit any mood.To read this article in full or to leave a comment, please click here

Amazon Kinesis Analytics lets devs analyze real-time data with SQL

Amazon launched a new tool on Thursday aimed at helping developers build applications that offer insights from a firehose of data in real time. Kinesis Analytics will let users set up SQL queries that run on data that's constantly updating, expanding the reach of the popular data analysis language beyond traditional database applications. Once a user has set up a Kinesis Analytics stream, the results can then be routed to up to four different services, including Amazon S3, Redshift, and Elasticsearch Service.It's a service that's useful for bringing in data from sources that are rapidly shifting in real time, like sensor information from the internet of things, or live data from a stock market. That's key as more and more companies start leaning on big sets of live data to help drive business applications. To read this article in full or to leave a comment, please click here

AMD turns back to x86 for server reboot as it downgrades ARM

AMD's move three years ago to rely on ARM for server chips is turning out to be a big mistake.The company is putting its faith back in x86 chips as it seeks a reboot in servers, a market in which the company was once a big player. Riddled with chip delays and abandoned projects, AMD has downgraded ARM in its server strategy.Instead of ARM-based servers, AMD is relying again on x86 chips, this time based on the promising Zen architecture, to take market share from Intel.AMD shipped its first ARM-based Opteron A-series processors early this year after delays. The first server chips based on a custom ARM-based core, called K12 core, could be released next year, an AMD spokesman said, but the company's server strategy next year is centered on Zen and x86.To read this article in full or to leave a comment, please click here