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Category Archives for "Networking"

Network Break 397: VMware Aria Sings Multicloud Management; NVIDIA Ordered To Stop Selling AI Chips To China

This week's Network Break podcast tackles space weather, new products from VMware, a significant firewall vulnerability, an order barring NVIDIA from selling certain chips to China, and more tech news.

The post Network Break 397: VMware Aria Sings Multicloud Management; NVIDIA Ordered To Stop Selling AI Chips To China appeared first on Packet Pushers.

Natural Vitamins to Help You Stay Alert

When it comes to staying alert throughout the day, many people turn to caffeine or sugary snacks for a quick energy boost. However, these foods can cause spikes and drops in blood sugar that ultimately lead to feelings of fatigue and low energy. To help keep you feeling energized and focused throughout the day, consider incorporating natural vitamins into your diet.

Vitamins That Help Promote Alertness

There are many vitamins that keep you feeling awake and energized. Here are a few of the most effective supplements to try:

Vitamin B6

The B vitamins are key for supporting brain health, and vitamin B6 in particular is known for its ability to help boost energy levels. This nutrient helps increase the production of the neurotransmitter serotonin, which promotes feelings of calm and well-being. It can also help improve sleep quality, making it an excellent choice for those who struggle with fatigue and low energy levels.

Iron

Iron is another essential nutrient that helps support brain health and energy levels. It plays an important role in the production of red blood cells, which are responsible for carrying oxygen throughout the body and to the brain. When your blood is low in Continue reading

Service Mesh And Ingress In Kubernetes: Lesson 2 – Ingress Fundamentals -Video

This video demonstrates installing an ingress controller, looks at different controller options, and provides some background on why you might want to use an ingress controller in a Kubernetes cluster. Michael Levan brings his background in system administration, software development, and DevOps to this video series. He has Kubernetes experience as both a developer and […]

The post Service Mesh And Ingress In Kubernetes: Lesson 2 – Ingress Fundamentals -Video appeared first on Packet Pushers.

Improving the accuracy of our machine learning WAF using data augmentation and sampling

Improving the accuracy of our machine learning WAF using data augmentation and sampling
Improving the accuracy of our machine learning WAF using data augmentation and sampling

At Cloudflare, we are always looking for ways to make our customers' faster and more secure. A key part of that commitment is our ongoing investment in research and development of new technologies, such as the work on our machine learning based Web Application Firewall (WAF) solution we announced during security week.

In this blog, we’ll be discussing some of the data challenges we encountered during the machine learning development process, and how we addressed them with a combination of data augmentation and generation techniques.

Let’s jump right in!

Introduction

The purpose of a WAF is to analyze the characteristics of a HTTP request and determine whether the request contains any data which may cause damage to destination server systems, or was generated by an entity with malicious intent. A WAF typically protects applications from common attack vectors such as cross-site-scripting (XSS), file inclusion and SQL injection, to name a few. These attacks can result in the loss of sensitive user data and damage to critical software infrastructure, leading to monetary loss and reputation risk, along with direct harm to customers.

How do we use machine learning for the WAF?

The Cloudflare ML solution, at a high level, Continue reading

Checking exit codes in bash

There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for them.Instead, you will see a textual description of the problem you encountered—such as “No such file or directory”—in a context like this:$ bin/runme bash: bin/runme: No such file or directory [ Get regularly scheduled insights by signing up for Network World newsletters. ] If you want to see the numeric exit code, you can use the echo $? command. The error message will tell you that there is no “runme” script in your bin directory. The echo $? command will respond with only a number.To read this article in full, please click here

Checking exit codes in bash

There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for them.Instead, you will see a textual description of the problem you encountered—such as “No such file or directory”—in a context like this:$ bin/runme bash: bin/runme: No such file or directory [ Get regularly scheduled insights by signing up for Network World newsletters. ] If you want to see the numeric exit code, you can use the echo $? command. The error message will tell you that there is no “runme” script in your bin directory. The echo $? command will respond with only a number.To read this article in full, please click here

Checking exit codes in bash

There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for them.Instead, you will see a textual description of the problem you encountered—such as “No such file or directory”—in a context like this:$ bin/runme bash: bin/runme: No such file or directory [ Get regularly scheduled insights by signing up for Network World newsletters. ] If you want to see the numeric exit code, you can use the echo $? command. The error message will tell you that there is no “runme” script in your bin directory. The echo $? command will respond with only a number.To read this article in full, please click here

Checking exit codes in bash

There are quite a few exit codes used on Linux systems, though no listing you can display when you’re feeling curious. In fact, you won’t see the numeric codes unless you specifically ask for them.Instead, you will see a textual description of the problem you encountered—such as “No such file or directory”—in a context like this:$ bin/runme bash: bin/runme: No such file or directory [ Get regularly scheduled insights by signing up for Network World newsletters. ] If you want to see the numeric exit code, you can use the echo $? command. The error message will tell you that there is no “runme” script in your bin directory. The echo $? command will respond with only a number.To read this article in full, please click here

netlab Release 1.3: VXLAN and EVPN

netlab release 1.3 contains two major additions:

  • VXLAN transport using static ingress replication or EVPN control plane – implemented on Arista EOS, Cisco Nexus OS, Dell OS10, Nokia SR Linux and VyOS.
  • EVPN control plane supporting VXLAN transport, VLAN bridging, VLAN-aware bundles, and symmetric IRB – implemented on Arista EOS, Dell OS10, Nokia SR Linux, Nokia SR OS (control plane), VyOS, and FRR (control plane).

Here are some of the other goodies included in this release:

Read more …

netlab Release 1.3: VXLAN and EVPN

netlab release 1.3 contains two major additions:

  • VXLAN transport using static ingress replication or EVPN control plane – implemented on Arista EOS, Cisco Nexus OS, Dell OS10, Nokia SR Linux and VyOS.
  • EVPN control plane supporting VXLAN transport, VLAN bridging, VLAN-aware bundles, and symmetric IRB – implemented on Arista EOS, Dell OS10, Nokia SR Linux, Nokia SR OS (control plane), VyOS, and FRR (control plane).

Here are some of the other goodies included in this release:

Read more …

Is VLAN 1 Special in Cisco Networks?

I got asked why we change from VLAN 1 to another VLAN in Cisco networks. What is bad with the default setup? Is VLAN 1 really magical in a Cisco network?

When Cisco ships a Catalyst switch to you, there is no configuration provided. This means that all the ports will be access ports and the only VLAN that exists is VLAN 1. Now, we’ve all seen networks that keep it like this. Everything is one big flat network and the only VLAN in use is VLAN 1. If this is a bad configuration depends on several factors, including the size of the network, but let’s take a look at some of the drawbacks to maintaining this configuration:

  • No segmentation – There is no segmentation. Every user can access every other user and anything else in the VLAN such as infrastructure, servers, IoT type devices, and so on
  • Default access – The user gets access simply by connecting their PC to the switch which may not be the desired outcome
  • Management access – Related to the first bullet point, if the switch has a management IP in VLAN 1, the user may be able to access and login to the Continue reading

Microsoft adds virtual cores to Windows Server licensing

Microsoft has announced a major update to its Windows Server licensing program, which in part was driven by threats of legal action by the European Union.The most notable change is adding the option of licensing Windows Server based on virtual cores in addition to the current option of paying based on the number of physical processor cores in host machines. [ Get regularly scheduled insights by signing up for Network World newsletters. ] “Today, Windows Server is licensed by physical core, which means customers must have access to the physical server hardware to ensure that they have enough Windows Server licenses to cover all physical cores in the machine,” wrote Nicole Dezen, Microsoft’s chief partner officer, in  a blog post.To read this article in full, please click here

Microsoft adds virtual cores to Windows Server licensing

Microsoft has announced a major update to its Windows Server licensing program, which in part was driven by threats of legal action by the European Union.The most notable change is adding the option of licensing Windows Server based on virtual cores in addition to the current option of paying based on the number of physical processor cores in host machines. [ Get regularly scheduled insights by signing up for Network World newsletters. ] “Today, Windows Server is licensed by physical core, which means customers must have access to the physical server hardware to ensure that they have enough Windows Server licenses to cover all physical cores in the machine,” wrote Nicole Dezen, Microsoft’s chief partner officer, in  a blog post.To read this article in full, please click here

Microsoft adds virtual cores to Windows Server licensing

Microsoft has announced a major update to its Windows Server licensing program, which in part was driven by threats of legal action by the European Union.The most notable change is adding the option of licensing Windows Server based on virtual cores in addition to the current option of paying based on the number of physical processor cores in host machines. [ Get regularly scheduled insights by signing up for Network World newsletters. ] “Today, Windows Server is licensed by physical core, which means customers must have access to the physical server hardware to ensure that they have enough Windows Server licenses to cover all physical cores in the machine,” wrote Nicole Dezen, Microsoft’s chief partner officer, in  a blog post.To read this article in full, please click here

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