Network ports

Description of available network ports and what they’re used for

Ports described as default mean that the port number is configured in /etc/clickhouse-server/config.xml. To customize your settings, add a file to /etc/clickhouse-server/config.d/. See the configuration file documentation.

Port	Description	Cloud	OSS
2181	ZooKeeper default service port. Note: see 9181 for ClickHouse Keeper		✓
8123	HTTP default port		✓
8443	HTTP SSL/TLS default port	✓	✓
9000	Native Protocol port (also referred to as ClickHouse TCP protocol). Used by ClickHouse applications and processes like clickhouse-server, clickhouse-client, and native ClickHouse tools. Used for inter-server communication for distributed queries.		✓
9004	MySQL emulation port		✓
9005	PostgreSQL emulation port (also used for secure communication if SSL is enabled for ClickHouse).		✓
9009	Inter-server communication port for low-level data access. Used for data exchange, replication, and inter-server communication.		✓
9010	SSL/TLS for inter-server communications		✓
9011	Native protocol PROXYv1 protocol port		✓
9019	JDBC bridge		✓
9100	gRPC port		✓
9181	Recommended ClickHouse Keeper port		✓
9234	Recommended ClickHouse Keeper Raft port (also used for secure communication if <secure>1</secure> enabled)		✓
9363	Prometheus default metrics port		✓
9281	Recommended Secure SSL ClickHouse Keeper port		✓
9440	Native protocol SSL/TLS port	✓	✓
42000	Graphite default port		✓