# WHATPORT(1186)

## NAME

port 1186 — MySQL NDB Cluster management — The NDB Cluster management server (ndb_mgmd) — the control plane for MySQL Cluster, not a SQL port.

Protocol: TCP  
IANA registry

## DESCRIPTION

MySQL NDB Cluster splits into management nodes (ndb_mgmd), data nodes (ndbd/ndbmtd), and SQL nodes (mysqld). Data and SQL nodes find the management server at port 1186 by default, and the ndb_mgm admin client connects there to run cluster commands. It is not the MySQL client protocol — that stays on 3306. A host listening on 1186 is a MySQL Cluster management node, so 1186 open on a scan tells you a whole cluster is nearby.

## EXPOSURE

**Do not expose.** The management protocol is the cluster's admin plane and is designed for a trusted private network; keep it on a cluster-internal interface, never on a public IP.

## CHECK

```sh
ndb_mgm -c TARGET:1186 -e show
```

## SEE ALSO

- docs — [MySQL Reference Manual — Quick Test Setup of NDB Cluster (default management port 1186)](https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-quick.html) (dev.mysql.com)
- docs — [MySQL Reference Manual — ndb_mgmd, the NDB Cluster Management Server Daemon](https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-programs-ndb-mgmd.html) (dev.mysql.com)
- source — [MySQL Server (GitHub)](https://github.com/mysql/mysql-server) (github.com)
- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

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