# WHATPORT(1862)

## NAME

port 1862 — MySQL Cluster Manager agent (mcmd) — The mcmd agent that provisions and controls a MySQL NDB Cluster — an admin plane, not a database.

Protocol: TCP  
IANA registry

## DESCRIPTION

MySQL Cluster Manager runs an agent process, `mcmd`, on each cluster host; its `bind_port` defaults to 1862, and the `mcm` client (and a plain `mysql` client pointed at `--port=1862`) connects there to issue cluster commands. Oracle registered the port with IANA in 2009 as "mysql-cm-agent". Commands sent over it create and delete clusters, start and stop `ndbd` and `mysqld` processes, and change configuration — so the port belongs to the management plane of an NDB Cluster, distinct from the 3306 data path.

## EXPOSURE

**Do not expose.** Anything that authenticates to the agent can start, stop, and reconfigure every node in the cluster; keep 1862 on the cluster's private management network and reach it over a VPN or bastion.

## CHECK

```sh
mysql -h TARGET -P 1862 --protocol=TCP -u mcmd -p -e 'show status --cluster mycluster;'
```

## SEE ALSO

- docs — [MySQL Cluster Manager — mcmd, the MySQL Cluster Manager Agent (default port 1862)](https://dev.mysql.com/doc/mysql-cluster-manager/8.4/en/mcm-using-mcmd.html) (dev.mysql.com)
- iana — [IANA port registry — 1862 (mysql-cm-agent)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=1862) (iana.org)

---

HTML: <https://whatport.net/1862/> · JSON: <https://whatport.net/1862.json> · full dataset: <https://whatport.net/ports.json>