Port 5432 supports PostgreSQL and postgresql (UDP reference coverage) across distinct transports. Review each protocol before writing firewall or monitoring policy.
Default PostgreSQL client/server protocol endpoint.
Applications, administrators, connection poolers and replication clients connecting to PostgreSQL.
Client to server
Keep private, require TLS where appropriate and enforce host-based and role-based least privilege.
postgresql (UDP reference coverage) is documented as a network service convention for port 5432 over UDP.
Use this reference entry when identifying or validating systems documented to use 5432/UDP.
Varies
Confirm the listening process and current vendor documentation before permitting traffic; a listed convention does not prove the active service or its security posture.