# 默认的MongoDB端口

下表列出了MongoDB使用的默认TCP端口:

| Default Port | Description                                                                                                                                                                                                                                                                                                                                                          |
| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `27017`      | [`mongod`](https://docs.mongodb.com/master/reference/program/mongod/#bin.mongod)和[`mongos`](https://docs.mongodb.com/master/reference/program/mongos/#bin.mongos)实例的默认端口。您可以使用[`port`](https://docs.mongodb.com/master/reference/configuring-options/#net.port)或[`——port`](https://docs.mongodb.com/master/reference/program/mongod/#%20cmdop-mongod%20-port)来更改该端口。 |
| `27018`      | 默认端口为[`mongod`](https://docs.mongodb.com/master/reference/program/mongod/%20bin.mongod)运行[**——shardsvr**](https://docs.mongodb.com/master/reference/program/mongod/%20#%20cmdoption-mongod-shardsvr)命令行选项或 **shardsvr** 值[**clusterRole**](https://docs.mongodb.com/master/reference/configuration-options/%20#%20sharding.clusterRole)设置在配置文件中。                     |
| `27019`      | 默认端口为[`mongod`](https://docs.mongodb.com/master/reference/program/mongod/%20bin.mongod)运行[**——configsvr**](https://docs.mongodb.com/master/reference/program/mongod/%20#%20cmdoption-mongod-configsvr)命令行选项或 **configsvr** 值[**clusterRole**](https://docs.mongodb.com/master/reference/configuration-options/%20#%20sharding.clusterRole)设置在配置文件中。                  |


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