Scott Lowe

AUGUST 6, 2021

Servers/Hardware. I saw this blog post about Curiefense , an open source Envoy extension to add WAF (web application firewall) functionality to Envoy. Via Alex Mitelman’s Systems Design Weekly 015 , I was pointed to this AWS article on multi-site active-active architectures. Virtualization. Career/Soft Skills.

Open Source 60

Open Source Load Balancer WAN Architecture 60

Scott Lowe

AUGUST 11, 2016

In this post you’ll find a collection of links to articles discussing the major data center technologies—networking, hardware, security, cloud computing, applications, virtualization…you name it! (If Numan Siddique describes the native DHCP support available in OVN (Open Virtual Network). Servers/Hardware. Networking.

Vmware 60

Vmware Hardware Storage Linux 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

MARCH 17, 2016

Servers/Hardware. Russell Pope at Kovarus recently wrote about using security groups to manage the VMware NSX distributed firewall. Two articles in particular stood out to me: one by Christos Karamanolis on erasure coding with VSAN 6.2 , and one by my good friend Jase McCarty on the use of sparse virtual swap files.

Vmware 60

Vmware Linux Network Open Source 60

Scott Lowe

SEPTEMBER 12, 2012

Using 1 GbE would have required too many ports, too many cables, and too many switches; 10 GbE offered Expedient a 23% reduction in cables and ports, a 14% reduction in infrastructure costs, and offered a significant bandwidth improvement (compared to the previous 1 GbE architecture). Note that there are trade-offs as a result.)

Intel 109

Intel Virtualization Data Center Network 109

Scott Lowe

APRIL 29, 2015

These protections are also expensive to implement in hardware. For Carrier Ethernet, Cisco ME3600—a very expensive switch—will allow you to implement such an architecture. This bypasses some IPv6 limitations because host routes are treated in hardware like ND cache entries (which means you get something like 32K entries).

IPv6 60

IPv6 Firewall Network Mobile 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

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. Servers/Hardware. Virtualization. I hope that something in here is useful to you. Networking. Security.

Vmware 60

Vmware Data Center Storage Virtualization 60

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

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

Scott Lowe

MAY 12, 2016

I recently spoke at Interop 2016 in Las Vegas, and while I was there I scribbled down some notes pertaining to how decomposing applications into microservices-based architectures was similar in some respects to decomposing networks into an overlay network and an underlay (physical) network. Servers/Hardware. Virtualization.

Vmware 60

Vmware Windows Network Agile 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

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

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

TM Forum

SEPTEMBER 10, 2021

This includes enabling greater programmability to address demands for low latency, high throughput and reliability, and security by creating new network architectures that encompass 5G, edge, cloud, IoT, AI and machine learning as part of a digital ecosystem. Connectivity-as-a-Service. Software Marketplace. white papers.

B2C 100

B2C Software Software Enterprise 100

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

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

Scott Lowe

AUGUST 26, 2014

Fathi re-emphasizes that VMware’s SDDC vision is an architecture, one built on the “power of AND.” ” vCloud Suite (and vCloud Air) is a manifestation of the SDDC vision/architecture. VMware’s SDDC vision/architecture delivers the power of “AND.” betas of vSphere and VSAN).

Vmware 65

Vmware Architecture Applications Storage 65

CIO Business Intelligence

APRIL 8, 2022

The pandemic also exposed the limitations of virtual private networks, which enable remote access to secure computing resources. A VPN lets employees “tunnel” in through the corporate firewall using an encrypted connection that rides on top of the public internet.

Security 87

Security WAN Policies Applications 87