Subnet Cheat Sheet: IPv4 Subnetting for Beginners
Are you new to subnetting? This cheat sheet will help you get started with easy-to-follow instructions & helpful diagrams. Subnet confidently in no time.Happy 50th Birthday Ethernet!
Some 50 years ago, at the Palo Alto Research Centre of that renowned photocopier company Xerox, a revolutionary approach to local digital networks was born. On the 22nd of May 1973 Bob Metcalf authored a memo that described "X-Wire", a 3Mbps common bus office network system developed at Xerox's Palo Alto Research Center (PARC). There are very few networking technologies from the early 70's that have proved to be so resilient (TCP/IP is the only other major networking technology from that era that I can recall), so it’s worth looking at Ethernet a little closer in order to see why it has enjoyed such an unusual longevity.Top 10 Things to Look for in a SASE Architecture
Here are the ten most important elements to consider when choosing a SASE architecture — according to Gartner's favor of single-vendor and integrated solutions.Heavy Wireless 005: How To Build A Wi-Fi Community With Ferney Munoz
Have you ever wanted to build a community of professionals in your field, but didn't know where to start? In this episode of the Heavy Wireless podcast, Keith Parsons interviews Ferney Munoz, founder of the Tes@s en Wi-Fi community in Latin America, to learn how he built a successful community of Wi-Fi professionals.
The post Heavy Wireless 005: How To Build A Wi-Fi Community With Ferney Munoz appeared first on Packet Pushers.
Heavy Wireless 005: How To Build A Wi-Fi Community With Ferney Munoz
Have you ever wanted to build a community of professionals in your field, but didn't know where to start? In this episode of the Heavy Wireless podcast, Keith Parsons interviews Ferney Munoz, founder of the Tes@s en Wi-Fi community in Latin America, to learn how he built a successful community of Wi-Fi professionals.My Belated Review of Cisco Live 2023
It’s been a couple of weeks since Cisco Live US 2023 and I’m just now getting around to writing about it. I was thrilled to attend my 18th Cisco Live and it was just the thing I needed to reconnect with the community. The landscape of Cisco Live looks a little different than it has in years past. There are some challenges that are rising that need to be studied and understood before they become bigger than the event itself.
Showstopping Reveals? Or Consistent Improvement?
What was the big announcement from Cisco this year? What was the thing that was said on stage that stopped the presses and got people chattering? Was it a switch? A firewall? Was it a revolutionary new AI platform? Or a stable IP connection to Mars? Do you even know? Or was it more of a discussion of general topics with some technologies brought up alongside them?
In the last few years you may have noticed that the number of huge big announcements coinciding with the big yearly conferences has come down a bit. Rather than having some big news drop the morning of the keynote the big reveals are being given their own time Continue reading
Overcoming security gaps with active vulnerability management
Organizations can reduce security risks in containerized applications by actively managing vulnerabilities through scanning, automated image deployment, tracking runtime risk and deploying mitigating controls to reduce risk.
Kubernetes and containers have become de facto standards for cloud-native application development due to their ability to accelerate the pace of innovation and codify best practices for production deployments, but such acceleration can introduce risk if not operationalized properly.
In the architecture of containerized applications, it is important to understand that there are highly dynamic containers distributed across cloud environments. Some are ephemeral and short-lived, while others are more long-term. Traditional approaches to securing applications do not apply to cloud-native workloads because most deployments of containers occur automatically with an orchestrator that removes the manual step in the process. This automatic deployment requires that the images be continuously scanned to identify any vulnerabilities at the time of development in order to mitigate the risk of exploit during runtime.
In addition to these challenges, software supply chain adds complexity to vulnerability scanning and remediation. Applications increasingly depend on containers and components from third-party vendors and projects. As a result, it can take weeks or longer to patch the affected components and release new software Continue reading
Upcoming Training: BGP Policy
On July 21st I’ll be teaching BGP Policy over at Safari Books Online. From the description:
This course begins by simplifying the entire BGP policy space into three basic kinds of policies that operators implement using BGP—selecting the outbound path, selecting the inbound path, and “do not transit.” A use case is given for each of these three kinds, or classes, of policies from the perspective of a transit provider, and another from the perspective of a nontransit operator connected to the edge of the ‘net. With this background in place, the course will then explore each of the many ways these classes of policy may be implemented using local preference, AS Path prepending, various communities, AS Path poisoning, and other techniques. Positive and negative aspects of each implementation path will be considered.
My courses are going through a bit of updating, but I think August and September will be How the Internet Really Works, followed by an updated course on troubleshooting. I’m incorporating more tools into the course, including (of course!) ChatGPT. Watch this space for upcoming announcements.
HN687 Juniper CORA Coherent Optics Enabling IPoDWDM
Its about reducing the cost and complexity of DWDM coherent optical networks. Connecting the DWDM network directly to your router removes the DWDM edge equipment which simplifies operation, reduce cost,space & power while improving provisioning time. How is Juniper entering this market and what do you need to know ?
The post HN687 Juniper CORA Coherent Optics Enabling IPoDWDM appeared first on Packet Pushers.
HN687 Juniper CORA Coherent Optics Enabling IPoDWDM
Its about reducing the cost and complexity of DWDM coherent optical networks. Connecting the DWDM network directly to your router removes the DWDM edge equipment which simplifies operation, reduce cost,space & power while improving provisioning time. How is Juniper entering this market and what do you need to know ?Cloudflare Zaraz supports JSONata
Cloudflare users leverage Zaraz for loading their third-party JavaScript tools. Tools like analytics, conversion pixels, widgets and alike, load faster and safer when loaded through Zaraz.
When configuring a tool in Zaraz, users can specify the payload to be included when sending information to it. This allows for the transmission of more detailed data. For example, when sending the "Button Clicked" event to Google Analytics, users can include additional information such as the ID of the button element and the content of the user_id cookie at the time of the button press. In Zaraz, users have the flexibility to add as many fields as desired when configuring the action.
Typically, information reaches Zaraz through the execution of zaraz.track("event name", { properties }) within the website's code. The properties object can contain relevant details that will be sent to third-party tools, such as the button ID in the previous example. However, there are cases where users may need to process and manipulate the information before sending it to their third-party tools.
To address this requirement, we recently introduced Worker Variables, which enables users to send information to a Cloudflare Worker, perform manipulations on it, and return a modified value. Continue reading
A New Contender: NVMe in the Data Center
NVMe (nonvolatile memory express) delivers the faster performance data centers need to move to and operate in hybrid and multi-cloud environments.What’s new in Calico Enterprise 3.17: Namespace isolation, WireGuard support for AKS and EKS, and more!
We are excited to introduce the early preview releases for Calico Enterprise 3.17. This release focuses on helping enterprises have a strong security posture for their containers and Kubernetes clusters. Let’s go through some of the highlights of this release.
Namespace isolation with automatic Security Policy Recommendations
Calico will now automatically generate security policies based on workload dependencies and incoming and outgoing traffic to isolate namespaces in your Kubernetes cluster.
WireGuard support for AKS and EKS with Calico CNI
Users can now protect data-in-transit data in Microsoft AKS and Amazon EKS clusters by enabling WireGuard encryption with the Calico CNI.
Improved management of Workload-based WAF
Secure specific workload-to-workload communications at the application level with Calico’s workload-based web application firewall (WAF) by selecting and deselecting specific services.
Policy-based routing for egress gateways
Define policies on which egress gateway to use (or none at all) depending on the destination of egress traffic.
We hope you’ll enjoy these product upgrades and enhancements. We will continue to deliver new releases with innovative solutions to solve container and Kubernetes security challenges. Watch this space for future updates and details about how to leverage these features in your environment.
Check out our self-paced workshops for Continue reading