Endpoint Security, Part 6: How Attackers Abuse IP, ICMP, TCP and UDP

This afternoon I went through the IPv4 and IPv6 headers. Tonight is about what attackers do with them. IP, ICMP, TCP and UDP were built when the internet was a small, trusted network. Source addres...

Nov 2, 2026 Daily Log

Endpoint Security, Part 5: Securing Networks, Threat Actors and the IP Header

Today I moved into the network security part of the course. It starts with the big questions (why networks need protecting, how data leaks, who attacks us) and then goes back to the foundation: the...

Nov 2, 2026 Daily Log

Endpoint Security, Part 4: Application, Email and Browser Attacks

The second half of today was about attacks on applications: websites, programs and APIs. Having built web apps and automations myself, this felt very close to home. Almost every attack here comes f...

Nov 1, 2026 Daily Log

Endpoint Security, Part 3: Cyber Attacks, Wireless and Mobile Attacks

Today I continued the Endpoint Security course. Yesterday was about tricking people. Today was about attacking the technology itself: hidden code, DNS, the local network, unknown software flaws, an...

Nov 1, 2026 Daily Log

Endpoint Security, Part 2: Deception and Social Engineering

The second part of today’s study was about deception: attacks that target people instead of computers. I covered social engineering briefly in my Introduction to Cybersecurity notes, but this cours...

Oct 31, 2026 Daily Log

Endpoint Security, Part 1: Threats, Vulnerabilities and Where Attacks Land

Today I started Cisco’s Endpoint Security course, the next course in the Junior Cybersecurity Analyst path. The first section asks a simple question: what can actually go wrong? My first surprise ...

Oct 31, 2026 Daily Log

Cybersecurity Foundations, Part 2: Malware, Social Engineering and Common Attacks

This is the second half of my notes from Cisco’s Introduction to Cybersecurity. Part 1 covered data, privacy, the McCumber Cube and the different kinds of attackers. This part covers how attacks ac...

Oct 30, 2026 Daily Log

Cybersecurity Foundations, Part 1: Data, Privacy, the McCumber Cube and Attackers

Today I went through my notes from Cisco’s Introduction to Cybersecurity, the first course in my Security+ phase. There was a lot in it, so I’m splitting it into two posts. This one is about data, ...

Oct 30, 2026 Daily Log

AWS Cloud Basics, Part 2: Security, Networking, Storage and Monitoring

This is the second half of my notes from AWS Cloud Practitioner Essentials. Part 1 covered how AWS started, EC2, Lambda and SQS. This part covers the topics that matter most for security work. Sha...

Oct 29, 2026 Daily Log

AWS Cloud Basics, Part 1: How AWS Started, EC2, Lambda and SQS

Yesterday I finished AWS Cloud Practitioner Essentials. I took handwritten notes all the way through, and the course covers a lot, so I’m writing it up in two parts. This first part is about where ...