The following is a position paper that I wrote in April of 2015 To set the timeline, this was merely weeks if not days after RadioShack anno...

A well known problem for network and security professionals in the enterprise is asymmetric routing.  At it's simplest, this is where tr...

To alleviate the fear of overburdening the CPU due to the collection of NetFlow statistics, Cisco gives us the option of using Sampled NetFl...

One of the most commonly covered security features when it comes to Cisco security is the ZBF.  It wouldn't be much of a network securit...

Since I'm sure many home labbers are still rocking Server 2003, I'll put it up in hopes that someone will still find it useful. This...

Have you ever wanted to create an ACL by country?  There's a number of different ways you can go about it.  Certain models of firewalls ...

According to it's man page, "tclsh is a shell-like application that reads TCL commands from its standard input or from a file and e...

The following is a PowerShell script to quickly hard code DNS servers for every network interface present on a computer. It will overwrite t...

It still surprises me that in 2016, there are still people out there who cannot, or will not, use Google to find the answer to their questi...

Here's a quick post on a very useful command when working with ACLs.  I first heard about it while watching a CBT Nugget video, and I ca...