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02Observing exposed services

Cowrie Honeypot

How quickly will someone find an exposed machine?

ActiveCowrie · Linux · VPS · SSH · Log analysis

The idea

I wanted a better understanding of the background noise that reaches an exposed service, rather than only reading about it.

The build

I deployed Cowrie on a VPS and used it as a safe way to observe interactions with a simulated SSH service and collect logs for investigation.

Problems & investigation

  • Reviewing patterns in connection and command activity
  • Separating automated behaviour from more general probing
  • Learning how exposed services are discovered

What I learned

  • Internet-facing services attract attention quickly
  • Logs become more useful when reviewed with a clear question
  • Defensive security starts with understanding what is visible

What's next

Continue investigating the collected activity and improve how the observations are organised for review.