Network ports
note
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 | ✓ |
