Topic

Cybersecurity

Labs, write-ups, CTFs, tooling and research, blue team and red team.

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Jul 27, 20263 min Intermediate

Wireshark: Traffic Analysis (TryHackMe write-up)

Hands-on packet analysis: detecting Nmap scans, ARP poisoning, DNS/ICMP tunneling and cleartext credentials, with the exact Wireshark filters used for each.

All articles

The 5N3 Domain Oct 24, 20262 min Intermediate

Checking fiventhree.com for the October 2026 Node CVEs

A routine ask: make sure nothing on the VPS was exposed to recent Node.js or PHP CVEs. There was no PHP to check, and Node turned out to be running an end-of-life line that a real security release had just skipped over.

The 5N3 Domain Sep 22, 20267 min Advanced

A full security audit of fiventhree.com, and the bug it found

An external and internal audit of the whole domain, five subdomains in. Most of it held up. One header fix turned out to be silently ignored in production for a reason worth knowing about.