Default MongoDB Port

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The following table lists the default TCP ports used by MongoDB:

Default Port	Description
`27017`	The default port for `mongod` and `mongos` instances. You can change this port with `port` or `--port`.
`27018`	The default port for `mongod` when running with `--shardsvr` command-line option or the `shardsvr` value for the `clusterRole` setting in a configuration file.
`27019`	The default port for `mongod` when running with `--configsvr` command-line option or the `configsvr` value for the `clusterRole` setting in a configuration file.
`27020`	The default port from which `mongocryptd` listens for messages. `mongocryptd` is installed with MongoDB Enterprise Server (version 4.2 and later) and supports automatic encryption operations.

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Glossary

Default MongoDB Read Concerns/Write Concerns