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Category Archives for "Networking"

VNFs and Containers: Heptagonal Pegs and Triangle Holes

One of my readers sent me this question:

It would be nice to have a blog post or a webinar describing how to implement container networking in case when: (A) application does not tolerate NAT (telco, e.g. due to SCTP), (B) no DNS / FQDN, is used to find the peer element and (C) bandwidth requirements may be tough.

The only thing I could point him to is the Advanced Docker Networking part of Docker Networking Fundamentals webinar (available with free subscription) where macvlan and ipvlan are described.

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Cisco links wireless, wired worlds with new Catalyst 9000 switches

Cisco is making it possible to run, manage, automate and secure wired and wireless networks all on top of a single operating system.Key to the company's next step in operational efficiency is a new Catalyst 9000 switch, the 802.11ax-ready 9800 Wireless LAN Controller family which is available in an on-premises chassis or as a software addition that can be run on select Catalyst 9000 switches or a private or public cloud, Cisco said.[ Related: Getting grounded in intent-based networking] High-Efficiency Wireless or 802.11ax promises a fourfold increase in average throughput per user and is designed to handle high-density public environments. But it also will be beneficial in Internet of Things (IoT) deployments, in heavy-usage homes, in apartment buildings and in offices that use bandwidth-hogging applications like videoconferencing.To read this article in full, please click here

Cisco links wireless, wired worlds with new Catalyst 9000 switches

Cisco is making it possible to run, manage, automate and secure wired and wireless networks all on top of a single operating system.Key to the company's next step in operational efficiency is a new Catalyst 9000 switch, the 802.11ax-ready 9800 Wireless LAN Controller family which is available in an on-premises chassis or as a software addition that can be run on select Catalyst 9000 switches or a private or public cloud, Cisco said.[ Related: Getting grounded in intent-based networking] High-Efficiency Wireless or 802.11ax promises a fourfold increase in average throughput per user and is designed to handle high-density public environments. But it also will be beneficial in Internet of Things (IoT) deployments, in heavy-usage homes, in apartment buildings and in offices that use bandwidth-hogging applications like videoconferencing.To read this article in full, please click here

Prepare For The ITIL Certification Exams With This $49 Training Bundle

Enterprise demands for IT services have grown considerably, so considering a role in IT service management (ITSM) can be a stable and lucrative career move. However, not just anyone can become an IT service manager; it requires earning IT certifications, which demand rigorous preparation. Not to mention, there are numerous courses to choose from online. If you want to earn an IT certification, this Ultimate ITIL Certification Training Bundle by Integrity Training can help you prepare for $49.To read this article in full, please click here

Choosing an EVPN Underlay Routing Protocol

EVPN is all the rage these days. The ability to do L2 extension and L3 isolation over a single IP fabric is a cornerstone to building the next-generation of private clouds. BGP extensions spelled out in RFC 7432 and the addition of VxLAN in IETF draft-ietf-bess-evpn-overlay established VxLAN as the datacenter overlay encapsulation and BGP as the control plane from VxLAN endpoint (VTEP) to VxLAN endpoint. Although RFC 7938 tells us how to use BGP in the data center, it doesn’t discuss how it would behave with BGP as an overlay as well. As a result, every vendor seems to have their own ideas about how we should build the “underlay” network to get from VTEP to VTEP, allowing BGP-EVPN to run over the top.

An example of a single leaf’s BGP peering for EVPN connectivity from VTEP to VTEP

Let’s take a look at our options in routing protocols we could use as an underlay and understand their strengths and weaknesses that make them a good or bad fit for deployment in an EVPN network. We’ll go through IS-IS, OSPF, iBGP and eBGP. I won’t discuss EIGRP. Although it’s now an IETF standard, it’s still not widely supported Continue reading

Real URLs for AMP Cached Content Using Cloudflare Workers

Real URLs for AMP Cached Content Using Cloudflare Workers
Real URLs for AMP Cached Content Using Cloudflare Workers

Today, we’re excited to announce our solution for arguably the biggest issue affecting Accelerated Mobile Pages (AMP): the inability to use real origin URLs when serving AMP-cached content. To allow AMP caches to serve content under its origin URL, we implemented HTTP signed exchanges, which extend authenticity and integrity to content cached and served on behalf of a publisher. This logic lives on Cloudflare Workers, meaning that adding HTTP signed exchanges to your content is just a simple Workers application away. Publishers on Cloudflare can now take advantage of AMP performance and have AMP caches serve content with their origin URLs. We're thrilled to use Workers as a core component of this solution.

HTTP signed exchanges are a crucial component of the emerging Web Packaging standard, a set of protocols used to package websites for distribution through optimized delivery systems like Google AMP. This announcement comes just in time for Chrome Dev Summit 2018, where our colleague Rustam Lalkaka spoke about our efforts to advance the Web Packaging standard.

What is Web Packaging and Why Does it Matter?

You may already see the need for Web Packaging on a daily basis. On your smartphone, perhaps you’ve searched for Christmas Continue reading

GPUs are vulnerable to side-channel attacks

Computer scientists at the University of California at Riverside have found that GPUs are vulnerable to side-channel attacks, the same kinds of exploits that have impacted Intel and AMD CPUs.Two professors and two students, one a computer science doctoral student and a post-doctoral researcher, reverse-engineered a Nvidia GPU to demonstrate three attacks on both graphics and computational stacks, as well as across them. The researchers believe these are the first reported side-channel attacks on GPUs.[ Read also: What are the Meltdown and Spectre exploits? | Get regularly scheduled insights: Sign up for Network World newsletters ] A side-channel attack is one where the attacker uses how a technology operates, in this case a GPU, rather than a bug or flaw in the code. It takes advantage of how the processor is designed and exploits it in ways the designers hadn’t thought of.To read this article in full, please click here

GPUs are vulnerable to side-channel attacks

Computer scientists at the University of California at Riverside have found that GPUs are vulnerable to side-channel attacks, the same kinds of exploits that have impacted Intel and AMD CPUs.Two professors and two students, one a computer science doctoral student and a post-doctoral researcher, reverse-engineered a Nvidia GPU to demonstrate three attacks on both graphics and computational stacks, as well as across them. The researchers believe these are the first reported side-channel attacks on GPUs.[ Read also: What are the Meltdown and Spectre exploits? | Get regularly scheduled insights: Sign up for Network World newsletters ] A side-channel attack is one where the attacker uses how a technology operates, in this case a GPU, rather than a bug or flaw in the code. It takes advantage of how the processor is designed and exploits it in ways the designers hadn’t thought of.To read this article in full, please click here

GPUs are vulnerable to side-channel attacks

Computer scientists at the University of California at Riverside have found that GPUs are vulnerable to side-channel attacks, the same kinds of exploits that have impacted Intel and AMD CPUs.Two professors and two students, one a computer science doctoral student and a post-doctoral researcher, reverse-engineered a Nvidia GPU to demonstrate three attacks on both graphics and computational stacks, as well as across them. The researchers believe these are the first reported side-channel attacks on GPUs.[ Read also: What are the Meltdown and Spectre exploits? | Get regularly scheduled insights: Sign up for Network World newsletters ] A side-channel attack is one where the attacker uses how a technology operates, in this case a GPU, rather than a bug or flaw in the code. It takes advantage of how the processor is designed and exploits it in ways the designers hadn’t thought of.To read this article in full, please click here

Get 90% Off Your First Year of RemotePC, Up To 50 Computers for $6.95

iDrive has activated a significant discount on their Remote access software RemotePC in these days leading into Black Friday. RemotePC by iDrive is a full-featured remote access solution that lets you connect to your work, home or office computer securely from anywhere, and from any iOS or Android device. Right now, their 50 computer package is 90% off or just $6.95 for your 1st year. If you've been thinking about remote access solutions, now is a good time to consider RemotePC. Learn more about it here.To read this article in full, please click here

Get 90% Off Your First Year of RemotePC, Up To 50 Computers for $6.95

iDrive has activated a significant discount on their Remote access software RemotePC in these days leading into Black Friday. RemotePC by iDrive is a full-featured remote access solution that lets you connect to your work, home or office computer securely from anywhere, and from any iOS or Android device. Right now, their 50 computer package is 90% off or just $6.95 for your 1st year. If you've been thinking about remote access solutions, now is a good time to consider RemotePC. Learn more about it here.To read this article in full, please click here

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