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  • SysAd and SecuritySystems Administration (SysAd) and Digital Security are two huge categories that are both hugely important in the modern world. SysAd ranges from compiling modules, configuring Apache webserver, updating servers and networking remote computers. Digital security, one of the most interesting aspects of the digital world, will see topics for everything from configuring firewalls, detecting security breaches, handling exploits, calculating risk and detecting threat vectors. I’m hugely interested in SysAd and security, as I see them both as critical aspects of entire businesses. Both SysAd and Security Individuals are in a constant arms race with malicious users and automated bot nets. As new tools to protect servers and systems are produced and rolled out, new ways to circumvent them are developed. As hackers find new ways to breach systems and services, security aficionados and clued up  system administrators patch, program and research their ways back to securer grounds.
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Coder, Hacker, SysAd & Forensic Investigator

A blog from a forensic investigator, ethical hacker and programmer

Tag: sysad

System Administration (SysAd) seems to be a core part of my day, from my job down to my hobbies. Remotely managed cloud-based Linux SysAd keeps me busy with expose to both production and development clusters. While hobbying sees my SysAd skills used at the opposite end of the spectrum, working on individual Raspberry PI machines. Commercially system admin is integral with networking, environment admin, security, patching and monitoring.

How to do Port Scanning with Nmap

Network Mapper, usually just known as Nmap, is a powerful yet compact tool to have in your arsenal, giving you…
Continue reading “How to do Port Scanning with Nmap”…
Posted on: April 1, 2016 Last updated on: January 18, 2022 Comments: 1 Written by: Paul Joyce

Vulnerability Scanners Vs Penetration Tester

While browsing forums and articles it seems there’s some confusion over the distinction between vulnerability scanners and penetration testers. What…
Continue reading “Vulnerability Scanners Vs Penetration Tester”…
Posted on: March 21, 2016 Last updated on: January 18, 2022 Comments: 1 Written by: Paul Joyce

How to remember the OSI 7 model in order

Remembering the OSI 7 Model – Mnemonics The order that the different layers of the Open Systems Interconnection 7 model…
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Posted on: February 1, 2016 Last updated on: January 7, 2022 Comments: 0 Written by: Paul Joyce

Explaining Denial of Service Attacks

Denial of Service attacks (DoS attacks) are rather simplistic in nature and devilishly easy to launch. In their simplest form…
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Posted on: November 10, 2015 Last updated on: January 18, 2022 Comments: 0 Written by: Paul Joyce

Information on Layers of the OSI-7 Model

What is the OSI-7 model? The Open-System Intercommunication model describes how the network communication layers are distinct and separate from…
Continue reading “Information on Layers of the OSI-7 Model”…
Posted on: September 15, 2015 Last updated on: January 7, 2022 Comments: 0 Written by: Paul Joyce

How to use Linux’s Traceroute (3 Examples)

Connections over a network often need debugging but due to the nature of the networking-beast, the actual topography of the…
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Posted on: July 5, 2015 Last updated on: January 7, 2022 Comments: 0 Written by: Paul Joyce

Shared Hosting > Leverage Browser Caching

We all know that faster websites are better websites. Not necessarily better quality, as the Internet is full of drivel,…
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Posted on: September 5, 2013 Last updated on: October 5, 2016 Comments: 1 Written by: Paul Joyce

Linux: Changing your password from the CLI

We all know that passwords are some of the most important pieces of information we have to remember, but on…
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Posted on: August 24, 2013 Last updated on: October 5, 2016 Comments: 0 Written by: Paul Joyce

Raspberry Pi Day2: Setting it up

So unlike most of the computer I’ve bought in the past, the Raspberry Pi doesn’t come with its own operating…
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Posted on: August 23, 2013 Last updated on: January 7, 2022 Comments: 0 Written by: Paul Joyce
Electronic Security

MCrypt – Securing your Linux files with Twofish Cryptography

With more and more details being stored on computers, it’s getting exponentially more important to keep them safe and secure. From internet…
Continue reading “MCrypt – Securing your Linux files with Twofish Cryptography”…
Posted on: September 27, 2012 Last updated on: October 5, 2016 Comments: 4 Written by: Paul Joyce
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Recent Posts

  • Reverse Shell Stabilisation
    Below is one example of how to stabilise a reverse-shell. What are the benefits of a reverse-shell: Makes using text…
    Continue reading “Reverse Shell Stabilisation”…
  • log4j Exploit – Solar CTF
    Last year, CVE-2021-44228 was discovered and it rocked the IT world. The vulnerability was found in logging software, log4j, and…
    Continue reading “log4j Exploit – Solar CTF”…
  • THM – Revenge CTF Room
    Todays Capture the Flag hacking writeup is for the TryHackMe room, Revenge. It’s a medium rated room with the following…
    Continue reading “THM – Revenge CTF Room”…
  • AoC3#19: Something Phishy Is Going On
    With the completion of the last 18 days worth of Advent of Cyber challenges, I’m now starting on the blue-teaming…
    Continue reading “AoC3#19: Something Phishy Is Going On”…
  • AoC3#18: Playing With Containers
    Our first half of the cloud challenges saw us meddling with Amazon’s AWS buckets and the AWSCLI. I found that…
    Continue reading “AoC3#18: Playing With Containers”…

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Recent Posts

  • Reverse Shell Stabilisation
    Below is one example of how to stabilise a reverse-shell. What are the benefits of a reverse-shell: Makes using text…
    Continue reading “Reverse Shell Stabilisation”…
  • log4j Exploit – Solar CTF
    Last year, CVE-2021-44228 was discovered and it rocked the IT world. The vulnerability was found in logging software, log4j, and…
    Continue reading “log4j Exploit – Solar CTF”…
  • THM – Revenge CTF Room
    Todays Capture the Flag hacking writeup is for the TryHackMe room, Revenge. It’s a medium rated room with the following…
    Continue reading “THM – Revenge CTF Room”…
  • AoC3#19: Something Phishy Is Going On
    With the completion of the last 18 days worth of Advent of Cyber challenges, I’m now starting on the blue-teaming…
    Continue reading “AoC3#19: Something Phishy Is Going On”…
  • AoC3#18: Playing With Containers
    Our first half of the cloud challenges saw us meddling with Amazon’s AWS buckets and the AWSCLI. I found that…
    Continue reading “AoC3#18: Playing With Containers”…

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