Scott Lowe

MARCH 17, 2016

I recently came across a couple useful troubleshooting guides, one for Open vSwitch (OVS) and OpenStack Neutron and one for VMware NSX. Servers/Hardware. Russell Pope at Kovarus recently wrote about using security groups to manage the VMware NSX distributed firewall. VMware recently GA’d version 6.2 Virtualization.

Vmware 60

Vmware Linux Network Open Source 60

Scott Lowe

OCTOBER 27, 2017

Russell Bryant has a post on Open Virtual Network (OVN) , a project within the Open vSwitch (OVS) community. Servers/Hardware. specifically, the new container network firewall functionality. When I was using Fedora, I needed some useful information on firewall-cmd , and found this article to be helpful. Virtualization.

Firewall 60

Firewall Virtualization Network Storage 60

Scott Lowe

AUGUST 16, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Colin Lynch shares some details on his journey with VMware NSX (so far). Servers/Hardware. Virtualization. Cloud Computing/Cloud Management. Here’s a great way.

Windows 60

Windows Virtualization Devops Vmware 60

Scott Lowe

MARCH 10, 2015

What’s really interesting to me is the (completely uncoordinated) alignment between Matt’s list of skills for networking pros and the list I provided to virtualization pros in a series of recent VMUG presentations (refer to slide 15, but the list is software development basics, Linux, automation/orchestration, and public cloud services).

Vmware 60

Vmware Linux Hardware Software Development 60

Scott Lowe

SEPTEMBER 3, 2013

Art Fewell takes a deeper look at the increasingly important role of the virtual switch. A discussion of “statefulness” brought me again to Ivan’s post on the spectrum of firewall statefulness. VMware introduced VMware NSX recently at VMworld 2013. Servers/Hardware. Virtualization.

Vmware 60

Vmware Data Center Storage Disaster Recovery 60

Scott Lowe

SEPTEMBER 12, 2012

Johnson shows a great diagram that reviews all the various types of VM-to-VM communications that can exist in modern data centers: VM-to-VM (on the same host) via the software-based virtual switch (could be speeds of 30 to 40 Gbps in this use case). Intel VT-c actually provides a couple of different ways to work in virtualized environments.

Intel 109

Intel Virtualization Data Center Network 109

Scott Lowe

MAY 12, 2016

Servers/Hardware. In the event you’re interested in an idea of how much latency the use of in-kernel hypervisor firewalling (such as that offered by VMware NSX) adds, have a look at this article by Sean Howard. Virtualization. It’s a good post, well worth reading (in my opinion). Nothing this time around. Maybe next time?

Vmware 60

Vmware Windows Network Agile 60

Galido

JUNE 28, 2018

Monitoring of virtual servers. As devices are discovered, probes will also detect the services and hardware it can monitor. Reducing the costs by buying only the hardware you need. Monitoring of operating time and periods of inactivity (uptime /downtime). Application monitoring. Web monitoring. Environmental monitoring.

Network 60

Network LAN VOIP Licensing 60

Scott Lowe

APRIL 8, 2013

Greg Ferro examines a potential SDN use case (an OpenFlow use case) in the form of enterprise firewall migrations. Servers/Hardware. Virtualization. I think I might have mentioned this before (sorry if so), but here’s a good write-up on using the Edge Gateway CLI for monitoring and troubleshooting. Interesting.

Storage 111

Storage Vmware WAN Virtualization 111

Scott Lowe

APRIL 29, 2015

These protections are also expensive to implement in hardware. This bypasses some IPv6 limitations because host routes are treated in hardware like ND cache entries (which means you get something like 32K entries). VMware NSX has a stateful IPv6 firewall that provides RA guard and ND inspection services.

IPv6 60

IPv6 Firewall Network Mobile 60

Scott Lowe

APRIL 24, 2015

This article by Russell Bryant is a great overview and update of the work going on with Open Virtual Network (OVN). This is kind of cool, and (in my humble opinion) a sign of changing times: Juniper has Vagrant boxes as well as a Vagrant plugin for working with vSRX (virtual firewall) VMs (via this article from Matt Oswalt).

Vmware 60

Vmware Storage Firewall Network 60

Fountainhead

MAY 12, 2009

Insights into Data Center Infrastructure, Virtualization, and Cloud Computing. N Apps that are inherently bound to hardware Such as physical instances of software for specific (e.g. high-performance) hardware, or physical instances remaining so for scale-out reasons. heard from customers is "What should I virtualize?"

Cloud 186

Cloud Data Center Applications Virtualization 186

Scott Lowe

JUNE 29, 2016

If you like geeking out over the hardware side of networking, you may find this Ars Technica article on the physical infrastructure of the global Internet to be an interesting read. (I Servers/Hardware. Virtualization. Patrick Ogenstad outlines what’s involved with managing Cisco IOS upgrades with Ansible.

Linux 60

Linux Network Hardware Vmware 60

Dataconomy

SEPTEMBER 12, 2023

Server virtualization can do the trick for you if you also struggle to scale your applications to meet growing demands without breaking the bank. Server virtualization is a game-changing technology that has revolutionized the way organizations deploy and manage their IT infrastructure.

Virtualization 78

Virtualization Storage Hardware Disaster Recovery 78

Scott Lowe

FEBRUARY 2, 2017

Michael Kashin has a great article on how Open Virtual Network (OVN, part of the Open vSwitch project) implements virtual networks in OpenStack. Servers/Hardware. Vivek Gite over at nixCraft explains how to use ufw (Uncomplicated Firewall) on Ubuntu to limit SSH connections. Virtualization. Good advice.

Linux 60

Linux Network Virtualization IPv6 60

Scott Lowe

MARCH 2, 2017

Tony Sangha took PowerNSX (a set of PowerShell cmdlets for interacting with NSX) and created a tool to help document the NSX Distributed Firewall configuration. Servers/Hardware. I just noticed this article about using Nova flavor extra-specs to pass QoS data down to the virtualization layer. Virtualization. What’s that?

Linux 60

Linux Devops Open Source Virtualization 60

Scott Lowe

MAY 3, 2013

I try to keep the information linked to data center technologies like networking, storage, virtualization, and the like, but occasionally other items slip through. Ranga Maddipudi ( @vCloudNetSec on Twitter) has put together two blog posts on vCloud Networking and Security’s App Firewall ( part 1 and part 2 ). Servers/Hardware.

Vmware 109

Vmware Storage Virtualization HP 109

Scott Lowe

OCTOBER 23, 2020

Still, there’s a decent collection of networking, cloud computing, and virtualization articles as well as a smattering of other topics for you to peruse. ” Speaking of Linux networking…Marek Majkowski of Cloudflare digs deep into conntrack , used for stateful firewalling functionality. Servers/Hardware.

Open Source 60

Open Source Vmware Disaster Recovery Linux 60

Scott Lowe

APRIL 2, 2021

In this post , Jakub Sitnicki digs way deep into the Linux kernel to uncover the answer to the question, “Why are there no entries in the conntrack table for SYN packets dropped by the firewall?” Servers/Hardware. This time, they’re exploiting a weakness that VMware can’t patch: people. Virtualization.

Vmware 60

Vmware Firewall Storage Comparison 60

Scott Lowe

JUNE 4, 2013

Tom Nolle asks the question , “Is virtualization reality even more elusive than virtual reality?” This post by Ranga Maddipudi shows you how to use App Firewall in conjunction with VXLAN logical networks. I talked before about the difference between network virtualization and SDN, so no need to mention that again.

HP 106

HP Virtualization Hardware Network 106

Scott Lowe

AUGUST 26, 2014

Ben Fathi, CTO of VMware, takes the stage to start the keynote, and goes through a recap of yesterday’s announcements: EVO and EVO:RAIL, vCloud Air rebranding and the availability of new services, VMware Integrated OpenStack (VIO), and new product versions (vCloud Suite 5.8, betas of vSphere and VSAN).

Vmware 65

Vmware Architecture Applications Storage 65

Scott Lowe

SEPTEMBER 24, 2021

Ivan Pepelnjak shares some links and thoughts on configuring the NSX-T firewall with a CI/CD pipeline built on GitHub Actions and Terraform Cloud. Servers/Hardware. Better patch your vCenter Server instances, as VMware released a security advisory with a long list of CVEs , including one with a severity score of 9.8/10.

Open Source 107

Open Source Cloud Network Storage 107

Scott Lowe

SEPTEMBER 8, 2016

Dmitri Kalintsev is back with another article in a series of articles on using hardware VXLAN tunnel endpoints (VTEPs) with VMware NSX. Here’s a handy post by Dale Coghlan on how to find object IDs for just about anything in a VMware NSX environment. Servers/Hardware. Virtualization. Networking.

Vmware 60

Vmware Linux Intel Storage 60

Scott Lowe

JUNE 4, 2013

Tom Nolle asks the question , “Is virtualization reality even more elusive than virtual reality?” This post by Ranga Maddipudi shows you how to use App Firewall in conjunction with VXLAN logical networks. I talked before about the difference between network virtualization and SDN, so no need to mention that again.

HP 61

HP Virtualization Hardware Network 61

Scott Lowe

AUGUST 25, 2015

In this post, I’ve gathered links to posts about networking, virtualization, Docker, containers, Linux, configuration management, and all kinds of other cool stuff. Servers/Hardware. Roie Ben Haim, who works in professional services at VMware, has a deep dive on the NSX distributed firewall (DFW). Networking.

Vmware 60

Vmware Linux Virtualization Tools 60

Scott Lowe

SEPTEMBER 24, 2021

Ivan Pepelnjak shares some links and thoughts on configuring the NSX-T firewall with a CI/CD pipeline built on GitHub Actions and Terraform Cloud. Servers/Hardware. Better patch your vCenter Server instances, as VMware released a security advisory with a long list of CVEs , including one with a severity score of 9.8/10.

Open Source 60

Open Source Cloud Network Storage 60

Scott Lowe

FEBRUARY 10, 2015

tech preview of virtual networks for Docker. Tom’s key point is that disaggregating software from hardware—which is kind of a given if you’re buying whitebox networking gear—gives you the (potential) flexibility to repurpose network gear based on the software running on it. Servers/Hardware. Virtualization.

Open Source 60

Open Source Vmware Network IBM 60

Virtualized Greek

AUGUST 27, 2013

Kit Colbert (VMware Principal Architect) & Carl Ecshenbach (VMware COO) Joe Baguley (VMware CTO, EMEA). VMware is talking about the business of IT and how they enable their own business to deliver applications. VMware is of course pushing their virtual SAN solution (vSAN) to provision and control storage.

Vmware 58

Vmware Load Balancer Data Center Virtualization 58

Scott Lowe

DECEMBER 10, 2015

Servers/Hardware. We all know that security is more than just a host-based firewall, but a host-based firewall can be part of an overall security strategy. This article provides a good introductory overview of Linux iptables commands for configuring host-based firewall rules on your Linux systems. Virtualization.

Windows 60

Windows Firewall Linux Architecture 60

Data Center Knowledge

JULY 17, 2013

The term “Cloud Management” is nebulous, but typically refers to a distinct set of tasks related to managing the infrastructure level (IaaS) cloud layers, typically comprised of the physical and virtual infrastructure, as well as the cloud orchestration layer – whether inside a corporation or a Service Provider cloud. Firewall rules.

Data Center 203

Data Center Cloud Data Applications 203