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Category Archives for "Networking"

Data center fiber to jump to 800 gigabits in 2019

The upper limits on fiber capacity haven't been reached just yet. Two announcements made around an optical-fiber conference and trade show in San Diego recently indicate continued progress in squeezing more data into fiber.In the first announcement, researchers say they’ve obtained 26.2 terabits per second over the roughly 4,000 mile-long trans-Atlantic MAREA cable, in an experiment; and in the second, networking company Ciena says it will start deliveries of an 800 gigabit-per-second, single wavelength light throughput system in Q3 2019.High-speed laser MAREA, translated as “tide” in Spanish, is the Telefónica-operated cable running between Virginia Beach, Va., and Bilbao in Spain. The fiber cable, initiated a year ago, is designed to handle 160 terabits of data per second through its eight 20-terabit pairs. Each one of those pairs is thus big enough to carry 4 million high-definition videos at the same time, network-provider Infinera explains in an Optical Fiber Conference and Exhibition published press release.To read this article in full, please click here

Data center fiber to jump to 800 gigabits in 2019

The upper limits on fiber capacity haven't been reached just yet. Two announcements made around an optical-fiber conference and trade show in San Diego recently indicate continued progress in squeezing more data into fiber.In the first announcement, researchers say they’ve obtained 26.2 terabits per second over the roughly 4,000 mile-long trans-Atlantic MAREA cable, in an experiment; and in the second, networking company Ciena says it will start deliveries of an 800 gigabit-per-second, single wavelength light throughput system in Q3 2019.High-speed laser MAREA, translated as “tide” in Spanish, is the Telefónica-operated cable running between Virginia Beach, Va., and Bilbao in Spain. The fiber cable, initiated a year ago, is designed to handle 160 terabits of data per second through its eight 20-terabit pairs. Each one of those pairs is thus big enough to carry 4 million high-definition videos at the same time, network-provider Infinera explains in an Optical Fiber Conference and Exhibition published press release.To read this article in full, please click here

Startups introduce new liquid cooling designs

With the increase in compute density making air cooling less and less feasible, liquid cooling is going mainstream. For data centers. Overclockers have been doing it for years.For the most part, liquid cooling involves piping in cooled water to a heat sink attached to the CPU. The water then cools the heat sink, and is pumped away to be circulated and cooled down.But there are some cases where immersion is used. That is where the entire motherboard is submerged in a nonvolatile liquid. Immersion is used in only the most extreme of cases, with the highest compute density and performance. For a variety of reasons, it isn’t widely used.One startup that hopes to change that showed its wares at the Open Compute Project Summit 2019, which ran last week in San Jose. The OCP has a special project called Advanced Cooling Solutions to promote liquid cooling and other advanced cooling approaches.To read this article in full, please click here

Startups introduce new liquid cooling designs

With the increase in compute density making air cooling less and less feasible, liquid cooling is going mainstream. For data centers. Overclockers have been doing it for years.For the most part, liquid cooling involves piping in cooled water to a heat sink attached to the CPU. The water then cools the heat sink, and is pumped away to be circulated and cooled down.But there are some cases where immersion is used. That is where the entire motherboard is submerged in a nonvolatile liquid. Immersion is used in only the most extreme of cases, with the highest compute density and performance. For a variety of reasons, it isn’t widely used.One startup that hopes to change that showed its wares at the Open Compute Project Summit 2019, which ran last week in San Jose. The OCP has a special project called Advanced Cooling Solutions to promote liquid cooling and other advanced cooling approaches.To read this article in full, please click here

Coming Togther for an All-Inclusive and Accessible Internet in South Asia

Last year, at the Internet Society Asia-Pacific and Middle-East Chapters Meeting, I was introduced to the series of easily-digestible and thought-provoking issue papers published by the Internet Society. Particularly, the one on digital accessibility had me shaking in disbelief. It stated that one in six people in the Asia-Pacific region lives with disability – that is a total of about 650 million people.

The Internet Society Pakistan Islamabad Chapter had always been active in promoting digital accessibility, but I realized that we need to do more, especially at the transnational level. Thus, the idea of organizing a regional forum on digital accessibility was born, and with support from the Internet Society Asia-Pacific Bureau, it became a reality.

The Regional Forum on Digital Accessibility was successfully held on 7 February in Islamabad. It brought together 120 participants, including Internet Society Chapter leaders from Afghanistan and Nepal, fellows from Sri Lanka, and speakers from India.

A major achievement emerging from the forum was the vow from Pakistan’s high-level government officials to include representation of persons with disabilities in the recently-established Prime Minister’s Task Force on Information Technology (IT) and Telecom that is developing a roadmap for Pakistan’s digital transformation. There was Continue reading

Célébration du 1er anniversaire du chapitre Guinéen de l’Internet Society

Le Chapitre Guinéen de l’Internet Society (ISOC Guinée) a célébré son 1er anniversaire le 9 février 2019 dans la salle de conférence de l’université de Simbaya (UniSim) sous le thème «A la découverte de l’Internet, Histoire et perspectives de l’Internet et de son écosystème en Guinée». Cet important événement a réuni 150 personnes pour marquer la présence de l’Internet Society en Guinée à travers le chapitre et mutualiser les efforts pour la promotion et le développement d’un Internet ouvert, globalement connecté, sécurisé et digne de confiance pour tous en Guinée. L’opportunité a aussi été donnée aux participants et membres du chapitre ISOC Guinée de découvrir le plan d’action 2019 de l’Internet Society et voir comment cela peut se décliner en projets et activités concrètes au niveau local.

La célébration de ce 1er anniversaire du chapitre ISOC Guinée a été soutenue financièrement par le programme de financement Beyond the Net de l’Internet Society et autres partenaires locaux du chapitre dont l’université de Simbaya (UniSim).

Au cours de cette célébration, il a décidé de rendre la date du 30 décembre de chaque année comme une date historique pour le chapitre afin de renforcer les relations d’amitié et de fraternité entre Continue reading

Day Two Cloud 005: Building A Startup In The Cloud Is Easy, Right?

Today’s Day Two Cloud episode is all about the realities of building a startup in the cloud era. Guest Adam Bertram shares his experiences launching a startup using cloud services such as Trello, Zapier, and Lambda; discusses why good APIs matter; and talks about how to balance immediate needs against long-term technical debt.

The post Day Two Cloud 005: Building A Startup In The Cloud Is Easy, Right? appeared first on Packet Pushers.

Spectrum for UDP: DDoS protection and firewalling for unreliable protocols

Spectrum for UDP: DDoS protection and firewalling for unreliable protocols

Today, we're announcing Spectrum for UDP. Spectrum for UDP works the same as Spectrum for TCP: Spectrum sits between your clients and your origin. Incoming connections are proxied through, whilst applying our DDoS protection and IP Firewall rules. This allows you to protect your services from all sorts of nasty attacks and completely hides your origin behind Cloudflare.

Last year, we launched Spectrum. Spectrum brought the power of our DDoS and firewall features to all TCP ports and services. Spectrum for TCP allows you to protect your SSH services, gaming protocols, and as of last month, even FTP servers. We’ve seen customers running all sorts of applications behind Spectrum, such as Bitfly, Nicehash, and Hypixel.

This is great if you're running TCP services, but plenty of our customers also have workloads running over UDP. As an example, many multiplayer games prefer the low cost and lighter weight of UDP and don't care about whether packets arrive or not.

UDP applications have historically been hard to protect and secure, which is why we built Spectrum for UDP. Spectrum for UDP allows you to protect standard UDP services (such as RDP over UDP), but can also protect any custom protocol Continue reading

Episode 47 – Introduction To Segment Routing

Many routing experts believe that segment routing provides significant advantages over MPLS, and more specifically MPLS Traffic Engineering (MPLS-TE). In this episode we take a look at some of the foundational concepts used in segment routing and some of the differentiators between it and MPLS.

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We would like to thank Cumulus Networks for sponsoring this episode of Network Collective.  Cumulus Networks makes networking software for the open, modern data center. It’s the only open networking software that allows you to affordably build and efficiently operate your network like the worlds largest data center operators. Your company’s success depends on your ability to “future-proof” your network so why would you choose old, legacy infrastructure to stay ahead Continue reading

Printing from the Linux command line

Printing from the Linux command line is easy. You use the lp command to request a print, and lpq to see what print jobs are in the queue, but things get a little more complicated when you want to print double-sided or use portrait mode. And there are lots of other things you might want to do — such as printing multiple copies of a document or canceling a print job. Let's check out some options for getting your printouts to look just the way you want them to when you're printing from the command line.Displaying printer settings To view your printer settings from the command line, use the lpoptions command. The output should look something like this:To read this article in full, please click here

Preventing Request Loops Using CDN-Loop

Preventing Request Loops Using CDN-Loop

HTTP requests typically originate with a client, and end at a web server that processes the request and returns some response. Such requests may pass through multiple proxies before they arrive at the requested resource. If one of these proxies is configured badly (for instance, back to a proxy that had already processed it) then the request may be caught in a loop.

Request loops, accidental or malicious, can consume resources and degrade user's Internet performance. Such loops can even be observed at the CDN-level. Such a wide-scale attack would affect all customers of that CDN. It's been over three years since Cloudflare acknowledged the power of such non-compliant or malicious request loops. The proposed solution in that blog post was quickly found to be flawed and loop protection has since been implemented in an ad-hoc manner that is specific to each individual provider. This lack of cohesion and co-operation has led to a fragmented set of protection mechanisms.

We are finally happy to report that a recent collaboration between multiple CDN providers (including Cloudflare) has led to a new mechanism for loop protection. This now runs at the Cloudflare edge and is compliant with other CDNs, allowing us to Continue reading

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