Joao Silva
I’m Joao Silva, an Incident Response Analyst who loves everything about cybersecurity. I enjoy tackling practical challenges on platforms like TryHackMe and HackTheBox, and I’m always learning more through industry certifications. My main skills are spotting security risks, analyzing threats, and doing digital forensics. I keep up with the latest technologies and cyber threats to ensure strong security measures. In my spare time, I work on projects to improve server security and automate monitoring. I also like to share my knowledge by publishing content on my website to help others learn. I’m dedicated to protecting data and maintaining system integrity in our constantly changing digital world.
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System Failure Behaviours Explained
The terms “fail open”, “fail close”, "Fail Safe", "Failover" describe how systems behave when they encounter a failure or unexpected event. These concepts are crucial to maintain either availability or ensure security depending on the requirements of the specific context.
Fail Open
A system that fails...
What’s Log4j and Log4Shell vulnerability
Log4j is a widely-used Java-based library developed by Apache Software Foundation that’s designed to enable developers log various levels of information (trace, debug, info, warn, error, and fatal) from their applications for troubleshooting and monitoring purposes. It has appenders that are responsible for determining...
How NAT and PAT Works
Network Address Translation (NAT)
This is a method that allows multiple devices on a local network to be mapped to a single public IP address, which conserves the number of public IP addresses needed.
How it works
Private to Public - When a device on a private...