Scott Lowe

OCTOBER 27, 2017

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. Operating Systems/Applications. I suppose this is fully expected, given the impact of VMware and hypervisors.

Firewall 60

Firewall Virtualization Network Storage 60

Scott Lowe

AUGUST 16, 2017

Colin Lynch shares some details on his journey with VMware NSX (so far). I wouldn’t take this information as gospel, but here’s a breakdown of some of the IPv6 support available in VMware NSX. Servers/Hardware. Operating Systems/Applications. Cloud Computing/Cloud Management.

Windows 60

Windows Virtualization Devops Vmware 60

Scott Lowe

SEPTEMBER 3, 2013

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. Operating Systems/Applications. This looks interesting. Security. Cloud Computing/Cloud Management.

Vmware 60

Vmware Data Center Storage Disaster Recovery 60

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. Operating Systems/Applications. It’s a good post, well worth reading (in my opinion). Maybe next time?

Vmware 60

Vmware Windows Network Agile 60

Scott Lowe

APRIL 24, 2015

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). Servers/Hardware. Here are some general guidelines for configuring syslog forwarding on a Cisco ASA firewall.

Vmware 60

Vmware Storage Firewall Network 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. Operating Systems/Applications. Patrick Ogenstad outlines what’s involved with managing Cisco IOS upgrades with Ansible.

Linux 60

Linux Network Hardware Vmware 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. Operating Systems/Applications. Macintosh Networking Security Storage Virtualization Automation iSCSI OpenFlow OpenStack Puppet SDN VMware' Mounting guest disk images on the host?

Storage 111

Storage Vmware WAN Virtualization 111

Scott Lowe

FEBRUARY 2, 2017

Servers/Hardware. Vivek Gite over at nixCraft explains how to use ufw (Uncomplicated Firewall) on Ubuntu to limit SSH connections. Operating Systems/Applications. John Kozej has a write-up on an NSX logical switch packet walk. Sam McGeown discusses deploying ECMP with NSX for a provider logical router.

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. Operating Systems/Applications. This tool exports the DFW configuration and then converts it into Excel format, and is available on GitHub.

Linux 60

Linux Devops Open Source Virtualization 60

Dataconomy

SEPTEMBER 12, 2023

With server virtualization, you can easily create, move, and delete virtual servers as needed, without the need for expensive hardware upgrades or complex reconfigurations. One of the key benefits of server virtualization is that it allows for more efficient use of hardware resources.

Virtualization 78

Virtualization Storage Hardware Disaster Recovery 78

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. Aye aye, Popeye!

Vmware 60

Vmware Firewall Storage Comparison 60

Scott Lowe

OCTOBER 23, 2020

” Speaking of Linux networking…Marek Majkowski of Cloudflare digs deep into conntrack , used for stateful firewalling functionality. Servers/Hardware. I recently stumbled across this utility to help protect your macOS-based system against persistent malware. Operating Systems/Applications. Programming.

Open Source 60

Open Source Vmware Disaster Recovery Linux 60

Scott Lowe

MAY 3, 2013

Ranga Maddipudi ( @vCloudNetSec on Twitter) has put together two blog posts on vCloud Networking and Security’s App Firewall ( part 1 and part 2 ). Some good advice here on scaling/sizing VXLAN in VMware deployments (as well as some useful background information to help explain the advice). Servers/Hardware. In vSphere 5.1,

Vmware 109

Vmware Storage Virtualization HP 109

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. Operating Systems/Applications.

Vmware 60

Vmware Linux Intel Storage 60

Scott Lowe

JUNE 4, 2013

This post by Ranga Maddipudi shows you how to use App Firewall in conjunction with VXLAN logical networks. Next, Jason dives a bit deeper on the relationship between network overlays and hardware , and shares his thoughts on where it does—and doesn’t—make sense to have hardware terminating overlay tunnels.

HP 106

HP Virtualization Hardware Network 106

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

This time around, the content is a bit heavier on cloud management and applications/operating systems, but still lots of good content all the way around (I hope, anyway). Servers/Hardware. Here’s a nice article on a multi-action security workflow built using VMware NSX, vShield Endpoint, and vCenter Orchestrator.

Open Source 60

Open Source Vmware Network IBM 60

Scott Lowe

AUGUST 25, 2015

I think I’ve mentioned this before (it’s really hard to keep track of which articles you’ve included in a Technology Short Take already, so apologies if this is a duplicate), but this article provides a good overview of the VXLAN control plane modes in VMware NSX. Servers/Hardware. Operating Systems/Applications.

Vmware 60

Vmware Linux Virtualization Tools 60

Scott Lowe

JUNE 4, 2013

This post by Ranga Maddipudi shows you how to use App Firewall in conjunction with VXLAN logical networks. Next, Jason dives a bit deeper on the relationship between network overlays and hardware , and shares his thoughts on where it does—and doesn’t—make sense to have hardware terminating overlay tunnels.

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.

Windows 60

Windows Firewall Linux Architecture 60