ReferencePorts
Port 5432
PostgreSQL, Database
Port 5432, PostgreSQL
Role: Database
Exposure: host-bound (firewall mandatory)
Purpose
Five Olympus databases. MUST be firewalled from internet. In prod, prefer managed Postgres.
Security
This port must be blocked at the host firewall from the internet. Only Caddy (ports 80/443) is publicly reachable.
Verify exposure
# From outside the VPS
nmap -p 5432 <vps-ip>
# Expected: filtered / closed