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Using htop to check performance on Linux

While it's one of the best tools for examining performance on Linux, htop still requires some explanation before you'll be ready to take advantage of all the data it displays. It’s an excellent tool, but you need to understand the coloring scheme, how to scroll up and down through the processes displayed, and how to change your view of what’s happening on the system.It may take some time to get used to the type of information shown and be ready to quickly notice performance problems. That, of course, means that you have to know what normal behavior looks like on your system, and this generally requires spending time with the tool on a relatively frequent basis. In other words, use htop when you’re not at all concerned about how your system is performing and you’ll likely be able to make good use of it when you are.To read this article in full, please click here

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Using Custom Vagrant Boxes with netsim-tools

A friend of mine started using Vagrant with libvirt years ago (it was his enthusiasm that piqued my interest in this particular setup, eventually resulting in netsim-tools). Not surprisingly, he’s built Vagrant boxes for any device he ever encountered, created quite a collection that way, and would like to use them with netsim-tools.

While I didn’t think about this particular use case when programming the netsim-tools virtualization provider interface, I decided very early on that:

• Everything worth changing will be specified in the system defaults
• You will be able to change system defaults in topology file or user defaults.

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Using Custom Vagrant Boxes with netlab

A friend of mine started using Vagrant with libvirt years ago (it was his enthusiasm that piqued my interest in this particular setup, eventually resulting in netlab). Not surprisingly, he’s built Vagrant boxes for any device he ever encountered, created quite a collection that way, and would like to use them with netlab.

While I didn’t think about this particular use case when programming the netlab virtualization provider interface, I decided very early on that:

• Everything worth changing will be specified in the system defaults
• You will be able to change system defaults in topology file or user defaults.

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Day Two Cloud 150: Proactive Network Operations With Augtera (Sponsored)

Sponsor and startup Augtera Networks joins Day Two Cloud to discuss Augtera's proactive network analysis and operations product, which is meant to make you aware of problems before they become…problems. Augtera brings together traditional network sources such as flows and SNMP, plus telemetry and metadata to provide actionable information across networks you own and networks you don't.

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NFA v 22.06 has arrived, featuring SNMP support

The post NFA v 22.06 has arrived, featuring SNMP support appeared first on Noction.

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RSA: Intel reference design to accelerate SASE, other security tasks

Intel has introduced a reference design it says can enable accelerator cards for security workloads including secure access service edge (SASE), IPsec, and SSL/TLS.The upside of the server cards would be offloading some application processing from CPUs, effectively increasing server performance without requiring additional server rack space, according to Intel. [ Get regularly scheduled insights by signing up for Network World newsletters. ] The announcement was made at RSA Conference 2022, and details were published in a blog post by Bob Ghaffardi, Intel vice president and general manager of the Enterprise and Cloud Division.To read this article in full, please click here

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RSA: Intel reference design to accelerate SASE, other security tasks

Intel has introduced a reference design it says can enable accelerator cards for security workloads including secure access service edge (SASE), IPsec, and SSL/TLS.The upside of the server cards would be offloading some application processing from CPUs, effectively increasing server performance without requiring additional server rack space, according to Intel. [ Get regularly scheduled insights by signing up for Network World newsletters. ] The announcement was made at RSA Conference 2022, and details were published in a blog post by Bob Ghaffardi, Intel vice president and general manager of the Enterprise and Cloud Division.To read this article in full, please click here

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RSA: Intel reference design to accelerate SASE, other security tasks

Intel has introduced a reference design it says can enable accelerator cards for security workloads including secure access service edge (SASE), IPsec, and SSL/TLS.The upside of the server cards would be offloading some application processing from CPUs, effectively increasing server performance without requiring additional server rack space, according to Intel. [ Get regularly scheduled insights by signing up for Network World newsletters. ] The announcement was made at RSA Conference 2022, and details were published in a blog post by Bob Ghaffardi, Intel vice president and general manager of the Enterprise and Cloud Division.To read this article in full, please click here

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RSA: Intel reference design to accelerate SASE, other security tasks

Intel has introduced a reference design it says can enable accelerator cards for security workloads including secure access service edge (SASE), IPsec, and SSL/TLS.The upside of the server cards would be offloading some application processing from CPUs, effectively increasing server performance without requiring additional server rack space, according to Intel. [ Get regularly scheduled insights by signing up for Network World newsletters. ] The announcement was made at RSA Conference 2022, and details were published in a blog post by Bob Ghaffardi, Intel vice president and general manager of the Enterprise and Cloud Division.To read this article in full, please click here

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Cisco adds to network training lineup with Cisco U. launch

Cisco is expanding the way current and future network pros acquire job-changing skills and prepare to earn certifications with a new educational unit called Cisco U.Cisco U. is a digital learning center that will offer a variety of online and in-person learning tools and classes, including quick-start skills assessments, tailored learning paths for Cisco certifications, and personalized AI-based skills recommendations. Read more: Network certs: Significant raises for the right onesTo read this article in full, please click here

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Private Access Tokens: eliminating CAPTCHAs on iPhones and Macs with open standards

This post is also available in 日本語, Español.

Today we’re announcing Private Access Tokens, a completely invisible, private way to validate that real users are visiting your site. Visitors using operating systems that support these tokens, including the upcoming versions of macOS or iOS, can now prove they’re human without completing a CAPTCHA or giving up personal data. This will eliminate nearly 100% of CAPTCHAs served to these users.

What does this mean for you?

If you’re an Internet user:

• We’re making your mobile web experience more pleasant and more private than other networks at the same time.
• You won’t see a CAPTCHA on a supported iOS or Mac device (other devices coming soon!) accessing the Cloudflare network.

If you’re a web or application developer:

• Know your user is coming from an authentic device and signed application, verified by the device vendor directly.
• Validate users without maintaining a cumbersome SDK.

If you’re a Cloudflare customer:

• You don’t have to do anything!  Cloudflare will automatically ask for and utilize Private Access Tokens
• Your visitors won’t see a CAPTCHA, and we’ll ask for less data from their devices.

Introducing Private Access Tokens

Over the past year, Cloudflare has collaborated Continue reading

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VPN providers flee Indian market ahead of new data rules

The Indian government directive mandates VPN providers store information about their customers for up to five years.

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Learning BGP Module 2 Lesson 6: Next Hops – Video

In the final installment of this series, Russ White covers BGP next hops, including: -Next hop in iBGP vs. eBGP -Multi-access links -Route reflectors -Route servers You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a diverse a mix of content from Ethan and Greg, plus selected […]

The post Learning BGP Module 2 Lesson 6: Next Hops – Video appeared first on Packet Pushers.

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Hedge 133: Brooks Westfield and Multifactor Testing

Multi-factor testing is one of the most important jobs a vendor takes on—and one of the most underrated. Testing across all possible configurations and use cases is nearly impossible. Brooks Westbrook joins Tom Ammon and Russ White on this episode of the Hedge to talk about the complexity of multi-factor testing and some of the consequences of that complexity.

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In Ukraine and beyond, what it takes to keep vulnerable groups online

This post is also available in 日本語, Deutsch, Français, Español, Português.

As we celebrate the eighth anniversary of Project Galileo, we want to provide a view into the type of cyber attacks experienced by organizations protected under the project. In a year full of new challenges for so many, we hope that analysis of attacks against these vulnerable groups provides researchers, civil society, and targeted organizations with insight into how to better protect those working in these spaces.

For this blog, we want to focus on attacks we have seen against organizations in Ukraine, including significant growth in DDoS attack activity after the start of the conflict. Within the related Radar dashboard, we do a deep dive into attack trends against Project Galileo participants in a range of areas including human rights, journalism, and community led non-profits.

To read the whole report, visit the Project Galileo 8th anniversary Radar Dashboard.

Understanding the Data

• For this dashboard, we analyzed data from July 1, 2021 to May 5, 2022 from 1,900 organizations from around the world that are protected under the project.
• For DDoS attacks, we classify this as traffic that we have determined is part of a Continue reading

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Cisco DNA Upgrade Issues – Application Update Stuck

After initiating Cisco DNA Appliance version 2.1.2.4 and starting an upgrade towards 2.2.2.8 in order to get to 2.2.3.5 I got a strange issue where the appliance system update went fine but the switch to 2.2.2.8 was disabled until Application Updates did not finish. The real issue here was that Application Updates of Cloud Connectivity – Data Hub got stuck on 12% for 4 days without timing out or finishing. Tried several appliance reboots from CIMC which didn’t help. Below are the steps that helped sort out Application Updates issues with container pods being stuck at the point of pooling

The post Cisco DNA Upgrade Issues – Application Update Stuck appeared first on How Does Internet Work.

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What is Wireshark?

Wireshark is a popular, free and open-source packet capture tool that enables network and security administrators to take a “deep dive” analysis into traffic moving through a network.Wireshark can be deployed for a variety of purposes including sniffing out security issues, troubleshooting network performance problems, traffic optimization, or as part of the application development and testing process.What Does Wireshark Do? Wireshark is primarily used to capture packets of data moving through a network. The tool allows users to put network interface controllers (NICs) into promiscuous mode to observe most traffic, even unicast traffic, which is not sent to a controller’s MAC address. However, doing this normally requires superuser permissions and may be restricted on some networks.To read this article in full, please click here

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Select the Best Switching ASIC For the Job

Last week I described some of the data center switching ASIC design tradeoffs and the ASIC families Broadcom created to fit somewhere in that multi-dimensional space.

Next step: how could you design your data center fabric to make the most out of them? To keep things simple, we’ll build a typical leaf-and-spine fabric with a WAN edge layer (sometimes called border leaf switches).

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Select the Best Switching ASIC For the Job

Last week I described some of the data center switching ASIC design tradeoffs and the ASIC families Broadcom created to fit somewhere in that multi-dimensional space.

Next step: how could you design your data center fabric to make the most out of them? To keep things simple, we’ll build a typical leaf-and-spine fabric with a WAN edge layer (sometimes called border leaf switches).

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How to manage scripts that manage network automation

Most major network outages happen as a result of human error, not equipment failures—mistakes in the settings themselves, missed steps in a sequence, steps taken out of order, etc. Automation through scripting is meant not only to speed up network operations activities but, as importantly, to reduce the chance of such mistakes by ensuring consistency. A script executes the same steps, in the same order, every time.Ad-hoc, scripting, or programmatic automation doesn’t eliminate the possibility of error, of course. It does limit the scope of the mistakes to the programs themselves, and robust testing should uncover most of them before they have a chance to be put into production. And, should a mistake get through and result in a bunch of misconfigured switches, there is one place to fix it—the script—that also provides the means of correcting the problem at machine speeds.To read this article in full, please click here