Incident Runbooks

Step-by-step playbooks for when things go sideways. Interactive checklists with copy-paste commands.

Connection Refused — SSH Troubleshooting Guide

Diagnose and fix SSH connection failures. Covers network connectivity, sshd configuration, firewall rules, fail2ban, and daemon troubleshooting.

10 min7 steps

linuxsshnetworkingconnectionfirewall

Connection Refused — PostgreSQL Troubleshooting Guide

Troubleshoot PostgreSQL connection failures. Covers service status, listen address configuration, pg_hba.conf authentication rules, connection limits, and restart procedures.

10 min7 steps

postgresqldatabaseconnectionauthentication

TLS Handshake Failure — Diagnosis Guide

Diagnose TLS/SSL connection failures. Covers certificate issues, version mismatches, cipher incompatibility, chain problems, SNI, and mTLS failures.

15 min8 steps

tlssslhandshakecertificatenetworkingopenssl