Connect to a Database Deployment
Considerations
Atlas does not guarantee that host names remain consistent with respect to node types during topology changes.
Example
If you have a cluster named foo123 containing an analytics
node foo123-shard-00-03-a1b2c.mongodb.net:27017, Atlas does
not guarantee that specific host name will continue to refer to an
analytics node after a topology change, such as
scaling a cluster to modify its
number of nodes or regions.
Prerequisites
IP Access List
To access a database deployment, you must connect from an IP address on the Atlas project's IP access list. If you need to add an IP address to the IP access list, you can do so in the Connect dialog. You can also add the IP address from the Network Access tab.
Database User
To access a database deployment, you must create a database user with access to the desired database(s) on your Atlas database deployment. Database users are separate from Atlas users. Database users have access to MongoDB databases, while Atlas users have access to the Atlas application itself.
You can create a database user to access your Atlas database deployment in the Connect dialog. You can also add the database user from the Database Deployment view.
Open Ports 27015 to 27017 to Access Atlas Databases
Make sure your application can reach your MongoDB Atlas environment. To add the inbound network access from your application environment to Atlas, do one of the following:
Add the public IP addresses to your IP access list
Use VPC / VNet peering to add private IP addresses.
Tip
See also:
If your firewall blocks outbound network connections, you must also open outbound access from your application environment to Atlas. You must configure your firewall to allow your applications to make outbound connections to ports 27015 to 27017 to TCP traffic on Atlas hosts. This grants your applications access to databases stored on Atlas.
Note
By default, MongoDB Atlas clusters do not need to be able to initiate connections to your application environments. If you wish to enable Atlas clusters with LDAP authentication and authorization, you must allow network access from Atlas clusters directly to your secure LDAP. You can allow access to your LDAP by using public or private IPs as long as a public DNS hostname points to an IP that the Atlas clusters can access.
If you are not using VPC / VNet peering and plan to connect to Atlas using public IP addresses, see the following pages for additional information:
Connect to Your Database Deployment
Note
To connect using mongodump or mongorestore,
use the Command Line Tools tab. The tab
creates an auto-generated template for connecting to your Atlas
database deployment with your preferred tool.
Troubleshooting
If you are experiencing issues connecting to your database deployment, see Troubleshoot Connection Issues.