How to Upgrade F5 BIG-IP Software
Life doesn’t stop once you buy your network equipment and install it in your network. You need to monitor your vendor software update notices since…
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CIDR Subnet Mask Cheat Sheet
We know it can be pain trying to remember which CIDR notation to use or what subnet mask to enter for a specific subnet. That’s…
Using PowerShell String Concatenation
If you work with PowerShell for more than a hot minute, it’s likely that you’ll need to concatenate strings or variables at some point. Whether…
Using PowerShell to Get AD Group Members
You can use the Get-AdGroupMember cmdlet in PowerShell with the Identity parameter to retrieve members of an AD group, which can consist of nested groups,…
How to Rename a Computer or Server with PowerShell
There is a plethora of reasons a computer or server might need to be renamed. It could be due to a reorg, a merger, or…
OSI Model Cheat Sheet
Here is an illustrated cheat sheet for the 7 layers of the OSI Model as used in computer networking. The OSI Model is a conceptual model that…
VMware ESXi Command Line Cheat Sheet
Below we list over 120+ common and useful CLI commands (including esxcli) for VMware ESXi Host and VM management. Keep in mind, these shell commands…
How to Stop Traceroute or Ping on a Cisco Device
Did you just start an extended ping or trace from the command line of a Cisco switch or router and are now staring at a…
How to Replace Failed ASA in Active/Standby HA Setup
Looking for the quick and clean way of replacing a failed Cisco ASA in an active/standby HA pair without breaking production traffic? You’re in the…
Enable ICMP Inspection on Cisco ASA – Make Allowing Ping Easier
So you have your shiny new (or new to you) Cisco ASA setup just the way you like it. You’ve allowed only what is needed…
Convert ASA 5516-X back to ASA from FTD
If you received a ASA 5500-X series firewall that is running FTD instead of ASA and you want to roll it back to ASA, (or…
Getting Flexible Netflow v9 on a Cisco 9300 to Export to SolarWinds NTA
I have recently begun a project to replace an aging fleet of Cisco 2911 routers across our WAN with new Cisco Catalyst 9300 switches. One…