Category Archives: Linux

Deploying Linux Instances in AWS

Today, I started using my corporate sanctioned AWS account and deployed a Linux jump box.  I created a key-pair and…

By Manny Fernandez

July 25, 2024

Using PhoneInfoga to research phone numbers

Had a friend come to me and let me know that someone was calling his house about some roofing deals. …

By Manny Fernandez

August 14, 2021

FortiClient CLI for Linux using Realms

Last year I wrote an article about installing FortiClient on a Linux machine.  There were two options; CLI and GUI.  Today…

By Manny Fernandez

May 18, 2020

Built-In “IPerf” on the FortiGate Firewall

I happen to love iperf.  Iperf is a tool that has been around for a long time.  The idea is…

By Manny Fernandez

May 14, 2020

Doing “IP Chicken” from the CLI

OK, so it is not REALLY IPChicken, but I need to equate it to something.  I use www.ipchiken.com but there are…

By Manny Fernandez

May 11, 2020

Setting Static IP Address on an Ubuntu Server

In preparation for another article I am writing, I deployed an Ubuntu Server 18.04.  By default, it boots with DHCP. …

By Manny Fernandez

April 1, 2020

Using OpenSSL to encrypt files

I am a big user of PGP and use it regularly to send encrypted email to colleagues and friends that…

By Manny Fernandez

March 7, 2020

Bash Script to dig a list of IP Addresses

Update: I modified the script.  It now gives you an NA or the PTR when available.   I had a customer…

By Manny Fernandez

March 2, 2020

Installing SecureCRT on Ubuntu 19.10

Recently I purchased a 1TB SSD drive for my Linux box and also updated the memory to 16GB.  The PC…

By Manny Fernandez

February 6, 2020

Live Ubuntu USB with Persistence

My son started a coding club in his middle school.  He teaches coding.  Specifically Python.  The issue is that his…

By Manny Fernandez

January 30, 2020

Fortinet FIT / Tinycore Linux Static IP addressing

Last night, I decided to deploy the Fortinet FIT OVA which is essentially a packet generator that pushes attacks, web…

By Manny Fernandez

November 25, 2019

Upgrading Ubuntu 18.0.4 LTS to 19.0.4

If you are running Ubuntu 18.0.4 LTS you CAN upgrade to 19.0.4.  LTS is long-term support while the non-LTS is…

By Manny Fernandez

October 2, 2019

Installing Tor on Ubuntu 19.04 and Windows 10

Yesterday I wrote a post about installing Tor on macOS.  I got a lot of feedback about other OS's.  I…

By Manny Fernandez

September 19, 2019

Installing FortiClient on Ubuntu Linux for SSL VPN

I ran Windows as my main Desktop OS for many years.  When XP came out, I decided to move to…

By Manny Fernandez

August 11, 2019

Installing Greenbone Vulnerability Manager

If you have even followed InfoSec, Cyber or whatever you want to call it, you will know that vulnerable code…

By Manny Fernandez

April 24, 2019

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
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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

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