Tag: ssh

All the articles with the tag "ssh".

• 2026-07-06

  Permission denied (publickey) is never a firewall problem

  I spent an hour debugging a firewall that was working perfectly. The error message had told me so in its first word.

• 2026-06-18

  Hardening a VPS is a sequencing problem

  Every setting I changed was one line I could have found in thirty seconds. The evening went somewhere else entirely — into deciding what order to apply them in.