Category Archives: Linux

iperf for Network Geeks

Throughout my career (over 27 years as of the writing of this post), I have needed to identify where problems…

By Manny Fernandez

April 20, 2019

Using NMAP

On September 1, 1997, Nmap was first released in Phrack magazine Issue 51, Article 11.  Since then it has been…

By Manny Fernandez

April 7, 2019

IPTable Firewall GUI

In 2000, I started a company named ITsecur. We created a Linux based firewall running the following: IPTables - Firewall…

By Manny Fernandez

March 5, 2019

Merging PCAP files from the CLI

With the Fortigate 6Ks, when you do a packet capture from the GUI, it will save multiple PCAP files into…

By Manny Fernandez

December 3, 2018

‘Diff’ Ways of Comparing Files

See what I did there? As a security engineer, I am always doing comparisons of files to see where things…

By Manny Fernandez

October 6, 2018

macOS Mojave and Home Brew

Since I switched Apple as my main computer, I was running Mac Ports https://www.macports.org/ However with the release of macOS…

By Manny Fernandez

October 2, 2018

Command Line Password Generator

I run macOS High Sierra. When I need to generate a random password, I use an opensource package named pwgen​.…

By Manny Fernandez

April 2, 2018

Syslog Server running ‘rsyslog’

Although I run FortiSIEM on my home lab, I wanted to have a quick & dirty, low cost, simple solution…

By Manny Fernandez

December 7, 2017

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