Default MongoDB Port

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.