Default MongoDB Port

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

Default Port	Description
`27017`	Default port for `mongod` and `mongos`. Change this port with `port` or `--port`.
`27018`	Default port for `mongod` when using the `--shardsvr` command-line option or `clusterRole` set to `shardsvr` in a configuration file.
`27019`	Default port for `mongod` when using the `--configsvr` command-line option or `clusterRole` set to `configsvr` in a configuration file.
`27020`	Default port on which `mongocryptd` listens for messages. MongoDB Enterprise Server includes `mongocryptd`, which supports automatic encryption operations.

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Read & Write Concerns