Basic scripting on Unix and Linux

Creating a script on a Unix or Linux system can be dead easy or surprisingly complex; it all depends on how much you’re trying to get the script to do. In this post, we look at scripting basics—at how to get started if you have never built a script before.Identifying the shell Unix and Linux systems today have a number of shells that you can use. Each shell is a command interpreter. It reads commands and sends them to the kernel for processing.[Get regularly scheduled insights by signing up for Network World newsletters.] Bash is one of the most popular, but there’s also zsh, csh, tcsh and korn. There’s even one called fish that can be especially nice for Linux beginners because of its helpful command auto-completion options. To determine which shell you are using, use this command:To read this article in full, please click here

Basic scripting on Unix and Linux

Creating a script on a Unix or Linux system can be dead easy or surprisingly complex; it all depends on how much you’re trying to get the script to do. In this post, we look at scripting basics—at how to get started if you have never built a script before.Identifying the shell Unix and Linux systems today have a number of shells that you can use. Each shell is a command interpreter. It reads commands and sends them to the kernel for processing.[Get regularly scheduled insights by signing up for Network World newsletters.] Bash is one of the most popular, but there’s also zsh, csh, tcsh and korn. There’s even one called fish that can be especially nice for Linux beginners because of its helpful command auto-completion options. To determine which shell you are using, use this command:To read this article in full, please click here

About the March 8 & 9, 2021 Verkada camera hack

About the March 8 & 9, 2021 Verkada camera hack

Cloudflare uses a vendor called Verkada for cameras in our offices in San Francisco, Austin, New York, London and Singapore. These cameras are used at the entrances, exits and main thoroughfares of our offices and have been part of maintaining the security of offices that have been closed for almost a year.

Yesterday, we were notified of a breach of Verkada that allowed a hacker to access Verkada’s internal support tools to manage those cameras remotely, as well as access them through a remote root shell. As soon as we were notified of the breach, we proceeded to shut down the cameras in all our office locations to prevent further access.

To be clear: this hack affected the cameras and nothing else. No customer data was accessed, no production systems, no databases, no encryption keys, nothing. Some press reports indicate that we use a facial recognition feature available in Verkada. This is not true. We do not.

Our internal systems follow the same Zero Trust model that we provide to our customers, and as such our corporate office networks are not implicitly trusted by our other locations or data centers. From a security point of view connecting from one of Continue reading

80/20 Rule For SaaS and IaaS

In this episode we discuss the 80/20 rule for SaaS and IaaS, what it is according to Vince, and why you should care. Is this a temporary phenomenon due to the pandemic and WFH or is it how we should view WAN traffic from now on?  We’ll answer that question and more in this episode.

Reference Links:

Brandon Carroll
Host
Phil Gervasi
Host
Vince Berk
Host

The post 80/20 Rule For SaaS and IaaS appeared first on Network Collective.

Day Two Cloud 088: The Tech Recruiter – Friend Or Foe?

Our guest is Taylor Desseyn, Sr. Recruiter Advocate at Vaco. Taylor knows tech recruiting forwards and backwards. He gives us an insider's view of how recruiters look at you and how you should look at them to maximize the benefit of the relationship. Because it IS a relationship. And like any relationship, you need to work at it.

The post Day Two Cloud 088: The Tech Recruiter – Friend Or Foe? appeared first on Packet Pushers.

What’s New in the Ansible Content Collection for Kubernetes – 1.2

Businesses continue to have a high demand for automation. This is not limited to infrastructure components, but stretches across the entire IT, including the platforms supporting application deployments. Here often Kubernetes is the way to go - and why in November we released the first Certified Content Collection for deploying and managing Kubernetes applications and services. Since then, the development and work in this area has only increased. That is why we recently released kubernetes.core 1.2.

In this blog post, we’ll go over what’s new and what’s changed in this release of our Kubernetes Collection.

 

New Modules

We continue to build on our existing support for Helm 3, the Kubernetes package manager: we added the new helm_template module, which opens up access to Helm’s template command.

 

Scenario: Examine a chart's content for further processing

There are times when you may need to take an existing chart and do something with its content. For example, there might be existing objects that you would like to bring under Helm's control and you need to compare what's deployed with what's in the chart. The newly added helm_template module gives you access to the rendered YAML of a chart. Continue reading

Internet Society Joins Leading Internet Advocates to Call on ISPs to Commit to Basic User Privacy Protections

By Electronic Frontier Foundation, Mozilla, and The Internet Society

As people learn more about how companies like Google and Facebook track them online, they are taking steps to protect themselves. But there is one relatively unknown way that companies and bad actors can collect troves of data.

Internet Service Providers (ISPs) like Comcast, Verizon, and AT&T are your gateway to the Internet. These companies have complete, unfettered, and unregulated access to a constant stream of your browsing history that can build a profile that they can sell or otherwise use without your consent.

Last year, Comcast committed to a broad range of DNS privacy standards. Companies like Verizon, AT&T, and T-Mobile, which have a major market share of mobile broadband customers in the U.S., haven’t committed to the same basic protections, such as not tracking website traffic, deleting DNS logs, or refusing to sell users’ information. What’s more, these companies have a history of abusing customer data. AT&T,  Sprint, and T-Mobile, sold customer location data to bounty hunters, and Verizon injected trackers bypassing user control.

Every single ISP should have a responsibility to protect the privacy of its users – and as mobile internet access continues Continue reading

Storage startup Pliops aims to boost flash performance

Rivals Intel and Nvidia are on the same side when it comes to the funding of a startup that promises to make flash storage orders of magnitude faster.The two are among numerous investors in Pliops, which is developing a specialized storage processor that it says allows applications to access data kept in flash storage up to 100 times faster than with traditional approaches while using a fraction of the electricity required by traditional hardware. Read more: NVMe over Fabrics creates data-center storage disruptionTo read this article in full, please click here

Storage startup Pliops aims to boost flash performance

Rivals Intel and Nvidia are on the same side when it comes to the funding of a startup that promises to make flash storage orders of magnitude faster.The two are among numerous investors in Pliops, which is developing a specialized storage processor that it says allows applications to access data kept in flash storage up to 100 times faster than with traditional approaches while using a fraction of the electricity required by traditional hardware. Read more: NVMe over Fabrics creates data-center storage disruptionTo read this article in full, please click here

Next-gen wireless options: Wi-Fi 6, 5G or private 5G?

One of the great debates in networking has been whether to use wired connectivity—which brings speed—or wireless—which delivers mobility. Recent versions of Wi-Fi deliver speeds comparable to wired, removing this debate. Wired connections are still faster, but for most user applications, including video, there is no experience difference. Looking ahead, next-generation wireless will be well North of 1Gbps, making it a no-brainer to use wireless.The next big decision: What kind of wireless?In the past, there was only one option, and that was Wi-Fi. Now there is another option coming into play, and that’s 5G. Not 5G like the kind one has attached to your mobile phone, but private 5G used within enterprise environments.To read this article in full, please click here

Azure Route Server: The Challenge

Imagine you decided to deploy an SD-WAN (or DMVPN) network and make an Azure region one of the sites in the new network because you already deployed some workloads in that region and would like to replace the VPN connectivity you’re using today with the new shiny expensive gadget.

Everyone told you to deploy two SD-WAN instances in the public cloud virtual network to be redundant, so this is what you deploy:

Read more …

Azure Route Server: The Challenge

Imagine you decided to deploy an SD-WAN (or DMVPN) network and make an Azure region one of the sites in the new network because you already deployed some workloads in that region and would like to replace the VPN connectivity you’re using today with the new shiny expensive gadget.

Everyone told you to deploy two SD-WAN instances in the public cloud virtual network to be redundant, so this is what you deploy:

Read more …

5 free network-vulnerability scanners

Though you may know and follow basic security measures on your own when installing and managing your network and websites, you'll never be able to keep up with and catch all the vulnerabilities by yourself.Vulnerability scanners can help you automate security auditing and can play a crucial part in your IT security. They can scan your network and websites for up to thousands of different security risks, producing a prioritized list of those you should patch, describe the vulnerabilities, and give steps on how to remediate them. Some can even automate the patching process.Though vulnerability scanners and security auditing tools can cost a fortune, there are free options as well. Some only look at specific vulnerabilities or limit how many hosts can be scanned but there are also those that offer broad IT security scanning.To read this article in full, please click here

5 free network-vulnerability scanners

Though you may know and follow basic security measures on your own when installing and managing your network and websites, you'll never be able to keep up with and catch all the vulnerabilities by yourself.Vulnerability scanners can help you automate security auditing and can play a crucial part in your IT security. They can scan your network and websites for up to thousands of different security risks, producing a prioritized list of those you should patch, describe the vulnerabilities, and give steps on how to remediate them. Some can even automate the patching process.Though vulnerability scanners and security auditing tools can cost a fortune, there are free options as well. Some only look at specific vulnerabilities or limit how many hosts can be scanned but there are also those that offer broad IT security scanning.To read this article in full, please click here

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