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Ceos3c

Ceos3c

Complicated Things – Made Easy

Stefan

Stefan is the founder & creative head behind Ceos3c. Stefan is a self-taught Software Engineer & Cyber Security professional and he helps other people to learn complicated topics.

Office 365 doesn’t work with VPN – Solution for pfSense

August 19, 2019August 13, 2019 by Stefan

A quick solution if Office 365 doesn’t work with VPN in combination with a pfSense firewall. This article might also give you hints for another firewall.

Categories SysAdmin Tags office 365, pfsense, vpn 1 Comment

How to securely Wipe a Hard Drive – Step by Step

May 11, 2022July 31, 2019 by Stefan
How to Securely wipe a hard drive

Lear how to securely wipe a hard drive before selling your old laptop or computer to make sure nobody else has access to your private data!

Categories Linux, SysAdmin Tags wipe hard drive 1 Comment

‘node’ is not recognized as an internal or external command VSCode

February 22, 2021July 19, 2019 by Stefan

I recently re-installed my Windows 10 machine and Visual Studio Code with it. All my extensions were gone too, and previously I have used the “Code Runner” extension to run JavaScript code directly in Visual Studio Code. I installed it, and when I tried to run my code I got the ‘node’ is not recognized … Read more

Categories Web Development Tags VSCode Leave a comment

Kali Linux for Raspberry Pi 4 released!

July 12, 2019July 10, 2019 by Stefan
Kali Linux for raspberry pi 4

After a long wait there was a upgrade to Raspberry Pi4 from the Pi3B+ a few weeks ago and Offensive Security already released Kali Linux for Raspberry Pi 4!

Categories Cyber Security Tags Kali Linux for Raspberry Pi 4 Leave a comment

The Linux CP Command – Explained & Made Easy

July 17, 2019July 9, 2019 by Stefan

The Linux CP Command made easy. I tell you the most important Linux cp commands and explain the syntax to you. Don’t worry – it’s easy!

Categories Linux Tags linux cp command Leave a comment

AWS with pfSense Part 2: Route53 DynDNS with pfSense

June 30, 2022April 20, 2019 by Stefan

After a lot of talking about it, we will dive right into it with setting up AWS Route53 DynDNS with pfSense. In this step by step tutorial, I will show you how you get Route53 DynDNS with pfSense working in no time!

Categories pfSense Tags aws, dynamic dns, dyndns, pfsense, route53 8 Comments

Linux Workstation Build

January 11, 2023February 20, 2019 by Stefan
Linux Workstation Build

I walk you through my 2019 Linux Workstation Build and explain my Choices. We also talk about Dual Boot on two different SSD’s and why I decided against it.

Categories Linux Tags linux workstation build 2 Comments

How to convert a .pem File to a .ppk File on Windows and Linux

May 11, 2022February 4, 2019 by Stefan
Convert a .pem File to a .ppk File

I show you how to convert a .pem File to a .ppk File so that you can connect to your Amazon EC2 instance in a Fast and Easy way!

Categories Linux, SysAdmin Tags .pem, .ppk, aws Leave a comment

How to disable Firefox Ads

January 11, 2023January 30, 2019 by Stefan
Disable Firefox Ads

Firefox recently introduced Ads in their browser. Gladly, there is an easy way to disable Firefox Ads in just one step. I’ll show you how.

Categories Miscellaneous Tags disable firefox ads Leave a comment

Update Certbot to use the latest Validation Method (ACME EOL!)

January 11, 2023January 22, 2019 by Stefan
Update Certbot

The ACME-TLS-SNI-01 reaches End of Life, I have an easy way for you to Update Cerbot to use the latest Validation Method.

Categories Linux Tags acme, certbot, update Leave a comment
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