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Category Archives for "Networking"

The Universal Spine Is Born!

The Universal Spine Is Born!

The rapid migration from enterprise to cloud, driven by the economics of scale, the convergence of local and wide-area networking (LAN-WAN), the migration from Fibre Channel to IP storage, the rise of analytics and the emergence of new cloud applications is dramatic. In the past two years, we have witnessed a massive shift in the way applications are built and deployed, moving away from legacy siloed infrastructure to seamless workload mobility. The demands of these new workloads change the way spine networks are reconstructed for cloud networking. As physical compute or storage silos evolve to support cloud applications, one can automate and provision the entire network to handle any workload, workflow or workstream, with real time agility.

Rolling Roots

In the world of public key cryptography, it is often observed that no private key can be a kept as an absolute secret forever. At some point keys need to be refreshed. And the root key of the DNS is no exception. Its time for this key to change.

Sad News: I’m Not Coming to Interop Las Vegas

Long story short: I burned out last autumn and still haven’t recovered.

I managed to find a replacement instructor for three of my workshops, so I hope they’ll still take place. I’m also working on other ways of delivering them to whoever is interested in an interactive live session.

To all the people who wanted to meet me in Las Vegas: I’m really sorry I’ll miss you. Interop was always a great place for interesting conversations and awesome workshop audiences.

GoBGP – A Control Plane Evolving Software Networking

If I have talked to you over the past year or two about networking, odds are I have mentioned a project to you called GoBGP. If we have spoken a lot, you are probably sick of me talking to you about GoBGP There is a reason, it’s because GoBGP is a missing link in networking that has been for a ... The post GoBGP – A Control Plane Evolving Software Networking appeared first on NetworkStatic | Brent Salisbury's Blog.

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Large US healthcare provider’s network shut down by malware

A large healthcare provider in the Washington, D.C., area said it has resorted to paper transactions after malware crippled part of its network early Monday.MedStar Health, a not-for-profit that runs 10 hospitals, said its clinical facilities were functioning and that it did not appear data had been compromised. The malware prevented "certain users from logging into our system.""MedStar acted quickly to prevent the virus from spreading throughout the organization," it said in a statement posted on Facebook. "We are working with our IT and cybersecurity partners to fully assess and address the situation."To read this article in full or to leave a comment, please click here

LACP is not Link Aggregation

So there’s a mistake I’ve been making, for years. I’ve referred to what is link aggregation as “LACP”.  As in “I’m setting up an LACP between two switches”. While you can certainly set up LACP between to switches, the more correct term for the technology is link aggregation (as defined by the IEEE), and an instance of that is generically called a LAG (Link Aggregation Group). LACP is an optional part of this technology.

Here I am explaining this and more in an 18 minute Youtube video.


FireEye says hackers are racing to compromise POS systems

Cybercriminals are redoubling efforts to steal payment card details from retailers before new defenses are put in place, according to FireEye.More than a dozen types of malware were found last year that target point-of-sale systems, the electronic cash registers the process payments at many retailers.Over the last few years, hackers have successfully breached the systems, targeting weaknesses or software vulnerabilities in order to extract card details to sell on the black market.As of last October, retailers are liable for fraudulent transactions that are not completed using EMV payment cards, which have a microchip and enhanced security defenses that better shield card data.  To read this article in full or to leave a comment, please click here

Configuring Macvlan and Ipvlan Linux Networking

Macvlan and Ipvlan are both Linux type networking interfaces that are both supported by the Linux kernel. They are unique for a few different reasons. One thing that makes them both very attractive is they do not use bridges in their implementation and natively namespace aware. It solves some painful problems such as getting access to a gateway from a ... The post Configuring Macvlan and Ipvlan Linux Networking appeared first on NetworkStatic | Brent Salisbury's Blog.

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DOJ cracks San Bernardino shooter’s iPhone

The U.S. government has managed to access the iPhone used by San Bernardino gunman Syed Rizwan Farook, bypassing a passcode that had the FBI stymied for several weeks. "The government has now successfully accessed the data stored on Farook’s iPhone and therefore no longer requires the assistance from Apple," the Department of Justice said in a court filing on Monday. The filing didn’t detail the method used to access the phone, but U.S. Attorney Eileen M. Decker said in a statement that it had been accomplished with the help of a third party.To read this article in full or to leave a comment, please click here

Going to IETF 95? Join the TLS 1.3 hackathon

If you’re in Buenos Aires on April 2-3 and are interested in building, come join the IETF Hackathon. CloudFlare and Mozilla will be working on TLS 1.3, the first new version of TLS in eight years!

At the hackathon we’ll be focusing on implementing the latest draft of TLS 1.3 and testing interoperability between existing implementations written in C, Go, OCaml, JavaScript and F*. If you have experience with network programming and cryptography, come hack on the latest and greatest protocol and help find problems before it is finalized. If you’re planning on attending, add your name to the Hackathon wiki. If you can’t make it, but implementing cryptographic protocols is your cup of tea, apply to join the CloudFlare team!

We’re very excited about TLS 1.3, which brings both security and performance improvements to HTTPS. In fact, if you have a client that speaks TLS 1.3 draft 10, you can read this blog on our TLS 1.3 mirror: tls13.cloudflare.com.

We hope to see you there!

Macvlan vs Ipvlan

I’ve covered macvlans in the Bridge vs Macvlan post. If you are new to macvlan concept, go ahead and read it first.

Macvlan

To recap: Macvlan allows you to configure sub-interfaces (also termed slave devices) of a parent, physical Ethernet interface (also termed upper device), each with its own unique MAC address, and consequently its own IP address. Applications, VMs and containers can then bind to a specific sub-interface to connect directly to the physical network, using their own MAC and IP address.

Linux Macvlan

Macvlan is a near-ideal solution to natively connect VMs and containers to a physical network, but it has its shortcomings:

  • The switch the host is connected to may have a policy that limits the number of different MAC addresses on a physical port. Although you should really work with your network administrator to change the policy, there are times when this might not be possible (or you just need to set up a quick PoC).
  • Many NICs have a limit on the number of MAC addresses they support in hardware. Exceeding the limit may affect the performance.
  • IEEE 802.11 doesn’t like multiple MAC addresses on a single client. It is likely macvlan sub-interfaces will be blocked Continue reading

Worth Reading: Trademarking hashtags

Now companies are trademarking hashtags in the same way they trademark logos, catchphrases and other designs, to keep other entities from using them to market or sell certain goods or services. In 2010, four years after Twitter first launched, just seven companies applied to trademark specific hashtags, according to a report from Thomson Reuters CompuMark. Five of the seven trademarks were granted. -via MarketWatch

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The post Worth Reading: Trademarking hashtags appeared first on 'net work.

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