VPS Tutorials
VPS PostgreSQL Won't Connect (2026): Troubleshooting Port 5432, listen_addresses, pg_hba.conf, and Service Startup Failures
When PostgreSQL on a VPS won't accept connections, common causes include the service not starting, 5432 not listening, listen_addresses bound only to localhost, pg_hba.conf not permitting the client, UFW/security group blocking, mismatched authentication methods, or startup failures caused by disk or shared memory. This article troubleshoots layer by layer: local connections, service status, logs, port listening, authentication configuration, and remote access.
