Scott Lowe

MAY 15, 2013

I’ve written before about adding an extra layer of network security to your Macintosh by leveraging the BSD-level ipfw firewall, in addition to the standard GUI firewall and additional third-party firewalls (like Little Snitch ). The robust pf firewall should now be running on your OS X Mountain Lion system.

Firewall 135

Firewall Resources Linux System 135

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 ). Virtualization.

Vmware 123

Vmware Storage Virtualization HP 123

Scott Lowe

NOVEMBER 7, 2014

It was good to read this post on Cumulus Linux first impressions by Jeremy Stretch. I’m a fan of Cumulus, but I’m admittedly a Linux guy (see here ) so you might say I’m a bit biased. Jeremy is a “hard-core” networking professional, and so hearing his feedback on Cumulus Linux was, in my opinion, useful.

Vmware 87

Vmware Linux Storage Virtualization 87

Linux Academy

FEBRUARY 13, 2019

Run firewall-cmd commands on both nodes, and allow traffic for Pacemaker (TCP ports 2224, 3121, 21064, and UDP port 5405): sudo firewall-cmd --permanent --add-service=high-availability. sudo firewall-cmd --reload. Install the Apache HTTP server on both nodes, and open the HTTP ports in the firewall: sudo yum install -y httpd.

Firewall 60

Firewall Resources Linux Authentication 60

Linux Academy

MAY 31, 2019

Ansible can help automate the backup, and you can learn more in this month’s how-to video that covers using Ansible to back up a Cisco ASA firewall. I understand not everyone “builds” workstations and servers, as many organizations use imaging and virtual templates.

Security 92

Security Backup Linux Operating Systems 92

Fountainhead

MAY 5, 2009

Insights into Data Center Infrastructure, Virtualization, and Cloud Computing. With the explosive growth of virtualization, this segment of technology is hotter than ever. In the way virtualization abstracts & configures the software world (O/S, applications, etc.), skip to main | skip to sidebar. Fountainhead.

Data Center 100

Data Center Virtualization Disaster Recovery Storage 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 68

HP Virtualization Hardware Network 68

Linux Academy

MARCH 28, 2019

Kubernetes nodes rely on underlying virtual servers for both the master control plane and for worker nodes. It is important to use security tooling such as OpenSCAP, the open source version of the Security Content Automation Protocol, to harden virtual machine images prior to their deployment in virtual private clouds.

Policies 68

Policies Linux Virtualization Security 68

Linux Academy

APRIL 9, 2019

From new courses to new labs, we have a ton of exciting new Google Cloud updates at Linux Academy ( where you can get the most Google Cloud training on this planet! ). Practice what you’re learning by spinning up live environments within Linux Academy! Creating Firewall Rules on a Google Cloud VPC Network.

Google 60

Google Training Cloud Linux 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. 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 20, 2016

Plumgrid is one of the primary commercial sponsors behind the IO Visor project , a Linux Foundation project, which leverages the extended Berkeley Packet Filter (eBPF) subsystem in the Linux kernel. MidoNet is an open source, overlay-based network virtualization solution. Project Calico. Next, I stopped by the Calico booth.

Meeting 60

Meeting Linux Storage Network 60

Dataconomy

APRIL 13, 2023

Virtual Network Computing (VNC) is a technology that has revolutionized the way we access and control remote computers. In this article, we will delve deeper into the world of Virtual Network Computing, exploring its history, technology, and various applications. What is Virtual Network Computing (VNC)?

Virtualization 36

Virtualization Network Linux Windows 36

Scott Lowe

DECEMBER 10, 2015

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.

Firewall 60

Firewall Linux Windows Architecture 60

Scott Lowe

JUNE 18, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful.

Vmware 60

Vmware Windows Virtualization Linux 60

Scott Lowe

JUNE 18, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful.

Vmware 60

Vmware Windows Virtualization Linux 60

Scott Lowe

MARCH 17, 2016

At DevOps Networking Forum 2016, I had the opportunity to share a presentation on some Linux networking options. Russell Pope at Kovarus recently wrote about using security groups to manage the VMware NSX distributed firewall. I knew Microsoft was cozying up to Linux, but I honestly didn’t expect they would port SQL Server to Linux.

Vmware 60

Vmware Linux Network Open Source 60

Linux Academy

JUNE 26, 2019

Virtually every industry, from healthcare to banking and everything in between, has rules for how businesses handle data. The Linux Audit system is a great solution. Your security team can use the Linux Unified Key Setup (LUKS) to encrypt and decrypt physical disks to keep data secure when not in use. Compliance Scanning.

Security 60

Security Linux Policies Meeting 60

Scott Lowe

OCTOBER 27, 2017

Russell Bryant has a post on Open Virtual Network (OVN) , a project within the Open vSwitch (OVS) community. 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. Servers/Hardware.

Firewall 60

Firewall Virtualization Network Storage 60

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. Roie Ben Haim, who works in professional services at VMware, has a deep dive on the NSX distributed firewall (DFW). Welcome to Technology Short Take #53. Networking.

Vmware 60

Vmware Linux Virtualization Windows 60

Cloud Musings

OCTOBER 9, 2018

It effortlessly integrates with any area of the IT infrastructure, be it provisioning virtual machines (VMs) or creating firewall rules. Moreover, Ansible comes in handy with aspects that other tools leave gaps in, such as zero-stop and continuous updates for multitier applications across the infrastructure.

Tools 94

Tools Applications Network Firewall 94

Scott Lowe

AUGUST 16, 2017

Sjors Robroek describes his nested NSX-T lab that also includes some virtualized network equipment (virtualized Arista switches). Here’s an interesting article on the role that virtualization is playing in the network functions virtualization (NFV) space now that ARM hardware is growing increasingly powerful.

Windows 60

Windows Virtualization Vmware Devops 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. I just noticed this article about using Nova flavor extra-specs to pass QoS data down to the virtualization layer. Here’s a walkthrough to install Arch Linux on VirtualBox.

Linux 60

Linux Devops Open Source Virtualization 60

Scott Lowe

MARCH 10, 2015

I highly recommend you read the entire post, but in short the five skills Matt recommends are software skills (which includes configuration management and software development tools like Git ), Linux, deep protocol knowledge, hypervisor and container networking, and IPv6. NixOS seems to be an interesting re-think of a Linux distribution.

Vmware 60

Vmware Linux Hardware Software Development 60

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. ” Ivan Pepelnjak attempts to answer the question, “How much do I need to know about Linux networking?” Virtualization. I hope you find something useful!

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?” Linux malware is getting more sophisticated. Virtualization. ” Get ready to get nerdy! Servers/Hardware.

Vmware 60

Vmware Firewall Storage Comparison 60

Scott Lowe

JUNE 29, 2016

In the event you accidentally locked yourself out of vCenter using NSX’s distributed firewall, this post by Roie Ben Haim provides a workaround for getting yourself out of this pickle. This is a highly technical article on scheduling in the Linux kernel , but it’s well worth reading. Virtualization.

Linux 60

Linux Network Hardware Vmware 60

ForAllSecure

MARCH 30, 2022

To access these sections of the building, there have to be doors, too, and behind these doors are the various companies, the various cloud clients with all their various virtual machines that can be spun up or spun down. You simply send an HTTP request and retrieve unique information per Virtual Machine (VM). You don't have to.

Firewall 52

Firewall Virtualization Authentication Linux 52

Scott Lowe

MARCH 8, 2015

Upon hearing the news that Red Hat had released the Atomic Host variant of Red Hat Enterprise Linux , I decided that it would be a good idea for me to take a look at the CentOS flavor of the Atomic Host variant. I’ve spent most of my time with Ubuntu (for general purpose Linux use cases) and CoreOS (for container-optimized use cases).

Linux 60

Linux Cloud Firewall Vmware 60

Scott Lowe

SEPTEMBER 8, 2016

The use of VMware NSX for microsegmentation is a really popular use case, and so the topic of scripting distributed firewall (DFW) rules often comes up. Red Hat Enterprise Linux Atomic Host (how’s that for a mouthful?) Virtualization. A more detailed analysis of silicon photonics can be had over at The Next Platform.

Vmware 60

Vmware Linux Intel Storage 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. Virtualization. x that involves booting on a Linux CD. I hope that something in here is useful to you.

Vmware 60

Vmware Data Center Storage Disaster Recovery 60

Scott Lowe

MAY 12, 2016

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). Servers/Hardware. Nothing this time around. Maybe next time?

Vmware 60

Vmware Windows Network Agile 60

Galido

JUNE 28, 2018

Monitoring of virtual servers. SSH: For Linux / Unix and MacOS systems. Monitoring of operating time and periods of inactivity (uptime /downtime). Bandwidth monitoring using SNMP, WMI, NetFlow, sFlow, jFlow, packet sniffing. Application monitoring. Web monitoring. SLA monitoring (service level agreement). Environmental monitoring.

Network 60

Network LAN VOIP Licensing 60

CTOvision

FEBRUARY 4, 2015

Before entering the land of Big Data, Alex spent the better part of ten years wrangling Linux server farms and writing Perl as a contractor to the Department of Defense and Department of Justice. Steve was previously CTO of Sanctum, a pioneer in Web application security testing and firewall software. He likes shiny objects.

Fractional CTO 150

Fractional CTO CTO CTO Hire Big Data 150

CTOvision

JANUARY 18, 2015

Before entering the land of Big Data, Alex spent the better part of ten years wrangling Linux server farms and writing Perl as a contractor to the Department of Defense and Department of Justice. Steve was previously CTO of Sanctum, a pioneer in Web application security testing and firewall software. He likes shiny objects.

Program Management 150

Program Management Fractional CTO CTO Programming 150

Scott Lowe

FEBRUARY 10, 2015

tech preview of virtual networks for Docker. The “gotcha” is that these software stacks haven’t been written yet, so the idea of repurposing hardware from switch to firewall to load balancer is still a bit of a unicorn. Virtualization. Never fear, this site has a walkthrough of the Socketplane.io Servers/Hardware.

Open Source 60

Open Source Vmware Network IBM 60

SecureWorld News

JUNE 12, 2023

is offered by Udemy and focuses on major operating systems like Windows, Mac OS, and Linux, providing learners with the skills they need to secure systems while preserving privacy and anonymity. Focusing on TCP/IP protocol suites, this certification centers around the methods used when creating and configuring firewall solutions.

Course 61

Course IBM Security Industry 61

ForAllSecure

MARCH 24, 2021

That meant I tested the release candidates -- not the final product you’d buy in the stores - for consumer-grade antivirus programs, desktop firewalls, and desktop Intrusion detection systems. And it's on your Mac, and virtually any company that runs the Linux operating system. But it’s actually from Eric S.

Open Source 52

Open Source Operating Systems Software Software 52