Cheat Sheets

Diagnosing DNS Propagation Delays During a Host Migration

How to tell a real DNS misconfiguration apart from ordinary caching delay during a host migration, using dig against the authoritative nameserver.

dns · networking · troubleshooting · cheat-sheet

Email Triage Cheat Sheet

A section-by-section framework for writing a real SOC email-triage report, down to the sentence starters that make it fast under pressure.

email · triage · soc · cheat-sheet

Markdown — Practical Cheatsheet

markdown · reference · cheat-sheet

Suspicious Email Artifacts

email · forensics · cheat-sheet