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Category Archives for "Networking"

Using the zip and zipcloak commands on Linux

Both the Linux zip and zipcloak commands can create encrypted zip files, but they have some important and interesting differences. Here’s what you need to know about how they work and what you should understand when using them.zip The zip command provides an easy way to take a group of files and squeeze their content into a single smaller file. To join a group of files into a single file—often done to make copying them to other systems considerably easier—use a command like the one shown below. The first argument is the name to be used for the zip file and is followed by the list of files to be included.To read this article in full, please click here

Reference Architecture and Easy Deployment Design Guides – NSX 3.2 Update

We are excited to announce an updated version of the NSX Reference Design and the NSX Easy Adoption Design guide based on the generally available NSX-T release 3.2. NSX-T 3.2 is part of the recently released VCF 4.5 software bundle, making it a very popular release among our customers.

To support you in your network and security virtualization journey, we introduced the NSX-T reference architecture design guide on the NSX-T 2.0 release, showing how you should design your data centers with NSX-T. Over time we introduced additional design guides such as the NSX-T Multi-Location Design Guide (Federation + Multisite), the Easy Adoption Design guide, and the NSX-T Data Center and EUC Design Guide for more specific use cases.

These latest updates cover the new features included in the 3.2 versions and the design and implementation guidelines we developed working tightly with our customers on their NSX projects.

The NSX Reference Design guide version 3.2

This document is the most essential document for any NSX practitioner. Whether you are just starting with NSX or have already successfully implemented NSX in your environment, the NSX Reference Design guide provides a clear and detailed description Continue reading

Why I Joined Rafay

Recently I made the decision to join Rafay Systems. I had been in Enterprise IT for over two decades (all in networking), and most recently at multicloud networking pioneer Aviatrix Systems. So what made me want to join Rafay? In a nutshell – application modernization. Although Multicloud Networking has grown to the point where Gartner … Continue reading Why I Joined Rafay →

UK competition agency launches inquiry into Broadcom’s $61B VMware buy

The UK’s Competition and Market’s Authority (CMA) has announced it is investigating Broadcom’s proposed acquisition of VMware to determine whether the deal would raise problems for competition.Semiconductor manufacturer and infrastructure software giant Broadcom first announced its intention to acquire VMware in May, in a deal worth $61 billion in stock and cash. However, not everyone is happy with the proposed deal, with senior analyst for Forrester, Tracy Woo, noting back in September that Broadcom had a poor track record when it came to previous acquisitions.To read this article in full, please click here

Tech Bytes: Boosting WAN Speeds While Cutting Costs With VMware SD-WAN (Sponsored)

On today’s Tech Bytes podcast, sponsored by VMware, we explore a real-world SD-WAN deployment. A customer in the automotive industry needed a better way to share large CAD files among global sites, and its MPLS network wasn’t cutting it. The company also wanted to lower WAN costs while improving performance of business apps. We talk with Coevolve, a VMware partner, on how Coevolve helped the automotive company deploy and operate a global SD-WAN from VMware that increased bandwidth by a factor of 10 and cut costs by as much as 40 percent.

The post Tech Bytes: Boosting WAN Speeds While Cutting Costs With VMware SD-WAN (Sponsored) appeared first on Packet Pushers.

Tech Bytes: Boosting WAN Speeds While Cutting Costs With VMware SD-WAN (Sponsored)

On today’s Tech Bytes podcast, sponsored by VMware, we explore a real-world SD-WAN deployment. A customer in the automotive industry needed a better way to share large CAD files among global sites, and its MPLS network wasn’t cutting it. The company also wanted to lower WAN costs while improving performance of business apps. We talk with Coevolve, a VMware partner, on how Coevolve helped the automotive company deploy and operate a global SD-WAN from VMware that increased bandwidth by a factor of 10 and cut costs by as much as 40 percent.

Network Break 408: Arista Launches Network Automation Pipeline; Palo Alto Targets Software Supply Chain Security

Take a Network Break! This week we cover a new continuous integration pipeline from Arista Networks to support network automation, Cisco's intention to open a new silicon design center in Spain, and Apple spending $450 million to support emergency text messaging using satellites. We also discuss Palo Alto Networks spending $195 million for Cider Security, financial results, and more.

The post Network Break 408: Arista Launches Network Automation Pipeline; Palo Alto Targets Software Supply Chain Security appeared first on Packet Pushers.

Network Break 408: Arista Launches Network Automation Pipeline; Palo Alto Targets Software Supply Chain Security

Take a Network Break! This week we cover a new continuous integration pipeline from Arista Networks to support network automation, Cisco's intention to open a new silicon design center in Spain, and Apple spending $450 million to support emergency text messaging using satellites. We also discuss Palo Alto Networks spending $195 million for Cider Security, financial results, and more.

BrandPost: Taking the Pulse of Data Center Automation

By: Arun Gandhi, Senior Manager of Product Marketing at Juniper NetworksWhen you’re trying to convince companies to modernize, it can seem like you’re shouting into the void. Sure, they understand that what you’re advocating is important, but knowing you should do something and actually doing it are two different things.This has been the story around data center network automation for the last several years.We all know that data centers have become more complex and critical to most businesses. So, finding a way to enable more agile and efficient operations should be on every company’s to-do list. Yet, even with organizations that could benefit most from automation — communication service providers (CSPs) and enterprises managing large, distributed data centers — actual implementation has been slow. Fortunately, we seem to be turning a corner.To read this article in full, please click here

Mastering Active Directory groups can streamline management, pave way for automation

On the surface, Active Directory groups are a simple and straightforward way to manage identities (users and/or computers) and assign permissions. Users or computers are added as group members, and the group is referenced in access control lists (ACL) on file shares, mailboxes, applications, or other corporate resources. But experienced admins know that this simplicity quickly goes out the window as environments scale. As group memberships grow, management of memberships becomes increasingly complex.Over the years, Microsoft and others have developed best practices for managing groups and permissions in an Active Directory environment. These strategies are something of a lost art, but there’s value to be gained by leveraging these layers of sophistication.To read this article in full, please click here

Mastering Active Directory groups can streamline management, pave way for automation

On the surface, Active Directory groups are a simple and straightforward way to manage identities (users and/or computers) and assign permissions. Users or computers are added as group members, and the group is referenced in access control lists (ACL) on file shares, mailboxes, applications, or other corporate resources. But experienced admins know that this simplicity quickly goes out the window as environments scale. As group memberships grow, management of memberships becomes increasingly complex.Over the years, Microsoft and others have developed best practices for managing groups and permissions in an Active Directory environment. These strategies are something of a lost art, but there’s value to be gained by leveraging these layers of sophistication.To read this article in full, please click here

netlab: IRB with Anycast Gateways

netlab release 1.4 added support for static anycast gateways and VRRP. Today we’ll use that functionality to add anycast gateways to the VLAN trunk lab:

Lab topology

Lab topology

We’ll start with the VLAN trunk lab topology and make the following changes:

  • We’ll rearrange the node list to make sure the switches get the lowest possible node ID:
nodes: [ s1, s2, h1, h2, h3, h4 ]
  • The switches have to use the new gateway module:
groups: switches: members: [ s1, s2 ] module: [ vlan, gateway ] device: eos
  • We have to enable first-hop gateway on VLAN links:
vlans: red: gateway: True blue: gateway: True
  • The default FHRP protocol is anycast (we could also use VRRP), and the default shared IP address is the last IP address in the subnet. We’ll use the first IP address in the subnet:
gateway.id: 1

After starting the lab you’ll notice the change in node identifiers and interface IP addresses. Without the anycast gateway, netlab assigns node ID 1 (and loopback IP address 10.0.0.1) to S1. Now that the node ID 1 is reserved, S1 gets loopback address 10.0.0.2.

The only other change on the Continue reading

Looking at Centrality in the DNS

Many aspects of the digital environment are dominated by a small clique of extremely large enterprises. Meta and Twitter may be teetering at the moment, but we have Google, Apple, Microsoft and Amazon who are still strongly dominant in their respective markets. Looking further afield, what about our common infrastructure services that everyone is forced to rely upon? How's the Domain Name System faring? Is the DNS also falling under the influence of these digital hypergiants? Or is the DNS still highly distributed and resisting the trends of centralization? Lets take a look at some DNS data to see if we can answer this question.

Mastodon – Part 1 – Installing

About this series

Mastodon

I have seen companies achieve great successes in the space of consumer internet and entertainment industry. I’ve been feeling less enthusiastic about the stronghold that these corporations have over my digital presence. I am the first to admit that using “free” services is convenient, but these companies are sometimes taking away my autonomy and exerting control over society. To each their own of course, but for me it’s time to take back a little bit of responsibility for my online social presence, away from centrally hosted services and to privately operated ones.

This series details my findings starting a micro blogging website, which uses a new set of super interesting open interconnect protocols to share media (text, pictures, videos, etc) between producers and their followers, using an open source project called Mastodon.

Introduction

Similar to how blogging is the act of publishing updates to a website, microblogging is the act of publishing small updates to a stream of updates on your profile. You can publish text posts and optionally attach media such as pictures, audio, video, or polls. Mastodon lets you follow friends and discover new ones. It doesn’t do this in a centralized way, however.

Groups Continue reading

Controversial Reads 111922


So in terms of the daily lived experience of most people reading this, truly autonomous vehicles just aren’t going to happen.


When the federal government gets together with social media giants to censor critics of the government, is that free speech or censorship?


If you own an advanced Android phone, you may find that Google Assistant will interrupt conversations to offer its own “insights”. Google is also pursuing “prebunking” of what it considers “misinformation” with preemptive propaganda campaigns.


The outcomes of such a system are incentives to not be the new person on a team, to not ask questions, to not work on new and unfamiliar efforts, and to not work together at all generally. Those behaviors become embedded in an organization’s DNA, despite whatever is advertised publicly.


Today’s business headlines herald a harsh reality for Big Tech: tumult at Twitter; meltdown at Meta; atrophy at Alphabet; adjustments at Amazon. Layoffs, sliding stock and shrinking valuations are hallmarks of the moment.


To understand the sudden downfall of the now-collapsed crypto exchange FTX, you have to go back to the beginning.


Twitter was their home. Elon broke into their home. Then he kicked out their friends, and told everyone left to Continue reading

Weekend Reads 111822


Internet users are being tricked into installing browser extensions that can hijack their web searches.


An offshore company that is trusted by the major web browsers and other tech companies to vouch for the legitimacy of websites has connections to contractors for U.S. intelligence agencies and law enforcement, according to security researchers, documents and interviews.


Silicon Valley startup Eliyan thinks its technology for enabling chiplet-based designs can best those from semiconductor giants Intel and TSMC by providing better performance, higher efficiency, fewer manufacturing issues, and more supply chain options.


While the number of cleartext passwords is an improvement compared with the 96,361 passwords exposed in 2020 and the more than 100,000 sent in the clear in 2019, there is still room for improvement, says Jessica Bair Oppenheimer, director of technical alliances at Cisco Secure.


Qualcomm and Arm have been engaged in one of those very entertainingly bitter court fist-fights that the industry throws up when friends fall out over money.


Unbound 1.16.0 adds support for Extended DNS Errors (EDEs) as codified in RFC 8914.


I suspect this reflects a significant change in the economics of the sector. For the last 20 years, Silicon Valley has had the Continue reading

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