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Category Archives for "Networking"

Using the seq command to generate numeric sequences

The seq command is handy for generating number sequences on Linux.It requires at least one number as an argument and, given that, it will provide all the numbers from 1 to whatever number you specify. However, that's just the command's simplest use. With additional arguments, seq can be surprisingly useful, especially when you use the generated numbers to drive a loop or do a calculation.How to tell if you're using a bash built-in in Linux The seq command below illustrates the most basic use of this command:To read this article in full, please click here

Using the seq command to generate numeric sequences

The seq command is handy for generating number sequences on Linux.It requires at least one number as an argument and, given that, it will provide all the numbers from 1 to whatever number you specify. However, that's just the command's simplest use. With additional arguments, seq can be surprisingly useful, especially when you use the generated numbers to drive a loop or do a calculation.How to tell if you're using a bash built-in in Linux The seq command below illustrates the most basic use of this command:To read this article in full, please click here

5G auction: AT&T and Dish spend billions while Verizon sits out

The usual suspects—bar one—spent big on the latest FCC auction for 5G spectrum, with AT&T and Dish headlining the winning bidders.At the top of the list was AT&T, which spent over $9 billion to acquire 1,624 licenses in the 3.45-3.98GHz range, according to the FCC. Each license represents the right to use 10MHz of that spectrum in a given geographical subdivision of the country.What is 5G? Close behind AT&T at $7.3 billion was Dish, which acquired 1,232 individual licenses. T-Mobile spent almost $2.9 billion on 199 licenses, and U.S. Cellular spent nearly $580 million on 380 licenses to shore up its own 5G spectrum holdings.To read this article in full, please click here

Cisco ups its game in top-shelf enterprise switching, Wi-Fi, 5G

Cisco has rolled out new wired and wireless gear aimed at amping up core campus wired and wireless networks to better support surging demand for remote connectivity.The company has added more powerful switches to the high end of its core enterprise Catalyst family—the biggest powered by Cisco’s high-performance Silicon One processors—as well as its Catalyst and Meraki wireless boxes to add Wi-Fi 6E support. It also announced private 5G as a service.To read this article in full, please click here

Providers and Privacy at NANOG 84

I’m speaking (in person) at NANOG84 on providers and privacy—

Privacy is a hot topic, but there’s little information for the networking professional in this area. This presentation will provide a quick overview and thoughts on the area of privacy aimed at transit provider operations personnel, including packet processing and logging. Note this presentation does not constitute legal advice, but rather just presents general concepts and thoughts from the perspective of a network engineer in an area of interest.

Need to Keep Analytics Data in the EU? Cloudflare Zaraz Can Offer a Solution

Need to Keep Analytics Data in the EU? Cloudflare Zaraz Can Offer a Solution
Need to Keep Analytics Data in the EU? Cloudflare Zaraz Can Offer a Solution

A recent decision from the Austrian Data Protection Authority (the Datenschutzbehörde) has network engineers scratching their heads and EU companies that use Google Analytics scrambling. The Datenschutzbehörde found that an Austrian website’s use of Google Analytics violates the EU General Data Protection Regulation (GDPR) as interpreted by the “Schrems II” case because Google Analytics can involve sending full or truncated IP addresses to the United States.

While disabling such trackers might be one (extreme) solution, doing so would leave website operators blind to how users are engaging with their site. A better approach: find a way to use tools like Google Analytics, but do so with an approach that protects the privacy of personal information and keeps it in the EU, avoiding a data transfer altogether. Enter Cloudflare Zaraz.

But before we get into just how Cloudflare Zaraz can help, we need to explain a bit of the background for the Datenschutzbehörde’s ruling, and why it’s a big deal.

What are the privacy and data localization issues?

The GDPR is a comprehensive data privacy law that applies to EU residents’ personal data, regardless of where it is processed. The GDPR itself does not insist that personal data must Continue reading

Turn tabs into spaces on Linux and vice versa

The Linux expand and unexpand commands sound like they can make files larger and smaller, but what they actually do is turn tabs into spaces and spaces into tabs.In this post, we’ll use some simple text files to demonstrate what happens when you use expand and unexpand. We’ll also compare how these commands work with some likely more familiar commands—sed and awk—that can provide similar results and offer additional options.[Get regularly scheduled insights by signing up for Network World newsletters.] To begin, let’s take a look at this very simple text file:To read this article in full, please click here

Turn tabs into spaces on Linux and vice versa

The Linux expand and unexpand commands sound like they can make files larger and smaller, but what they actually do is turn tabs into spaces and spaces into tabs.In this post, we’ll use some simple text files to demonstrate what happens when you use expand and unexpand. We’ll also compare how these commands work with some likely more familiar commands—sed and awk—that can provide similar results and offer additional options.[Get regularly scheduled insights by signing up for Network World newsletters.] To begin, let’s take a look at this very simple text file:To read this article in full, please click here

Do a Cleanup Before Automating Your Network

Remington Loose sent me an interesting email describing his views on the right approach to network automation after reading my Network Reliability Engineering Should Be More than Software or Automation rant – he’s advocating standardizing network services and cleaning up your network before trying to deploy full-scale automation.

I think you are 100% right to start with a thorough cleanup before automation. Garbage in, garbage out. It is also the case that all that inconsistency and differentiation makes for complexity in automation (as well as general operations) that makes it harder to gain traction.

Read more …

DC Fabric Intelligence Panel at DCD

On the 10th of February (next week) I’m participating in a panel discussing—

A networking strategy involving disaggregation deployment, overlay network virtualization, automation, and visibility can remedy the complexities with better utilization and performance and ultimately enable network slicing and self-healing abilities. Cloudification of the network is here, but how far do we need to go, and what is the impact on the hardware?

You can find more information about joining here.

Cloud Engineering For The Network Pro (Video)

The Packet Pushers are launching a new video series with Michael Levan on cloud engineering for network pros. The first video in the series gets into the basics of cloud networks. Michael covers AWS and Azure in particular. You can watch the video below, or click here to see it on YouTube. You can subscribe […]

The post Cloud Engineering For The Network Pro (Video) appeared first on Packet Pushers.

Juniper adds security upgrades for SASE, security management

Juniper Networks has added firewall-as-a-service, policy, and segmentation features to its cloud-based security family that lets enterprise customers control and protect on-premises or cloud-based resources.The new Juniper Secure Edge package expands and strengthens brings key enterprise security features to Juniper’s core cloud-based management platform Security Director Cloud, but also bolsters the vendor’s secure access service edge (SASE) strategy.  What is SDN and where it’s going Security Director Cloud learns customers’ policies and configurations and syncs them with on-prem firewalls. It includes zero-touch provisioning and configuration wizards for secure connectivity, content security and advanced threat prevention. It also includes Security Director Insights, which correlates attack details with threat intelligence—including attack information gathered from other vendors’ products—to update security policies automatically.To read this article in full, please click here

Cato Networks Adds A Cloud Access Security Broker (CASB) For App Visibility And Control

Cato Networks is announcing the availability of a Cloud Access Security Broker (CASB) capability that will be integrated into Cato’s cloud-based security service, which already includes next-gen firewalls, anti-malware, and more. The CASB provides visibility into, and control over, SaaS, cloud, and on-premises applications. Visibility is a key feature of the CASB service. SaaS and […]

The post Cato Networks Adds A Cloud Access Security Broker (CASB) For App Visibility And Control appeared first on Packet Pushers.

Day Two Cloud 132: What Web3 Means For Infrastructure Engineers

Web3 is the term for an emerging technology movement that aims to create a more decentralized Internet and put more ownership in the hands of individual users and consumers. At present Web3 is associated with cryptocurrencies and NFTs, but it's worth understanding the technological underpinnings of Web3, particularly blockchain and its broader applications. Our guide to Web3 infrastructure is Josh Neuroth.

The post Day Two Cloud 132: What Web3 Means For Infrastructure Engineers appeared first on Packet Pushers.

Day Two Cloud 132: What Web3 Means For Infrastructure Engineers

Web3 is the term for an emerging technology movement that aims to create a more decentralized Internet and put more ownership in the hands of individual users and consumers. At present Web3 is associated with cryptocurrencies and NFTs, but it's worth understanding the technological underpinnings of Web3, particularly blockchain and its broader applications. Our guide to Web3 infrastructure is Josh Neuroth.
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