You can't access your file system

There are a number of potential causes for being unable to access your file system, each with their own resolution, as follows.

The file system's elastic network interface was modified or deleted

You must not modify or delete any of the file system's elastic network interfaces. Modifying or deleting a network interface can cause a permanent loss of connection between your virtual private cloud (VPC) and your file system. Create a new file system, and don't modify or delete the Amazon FSx network interface. For more information, see File System Access Control with Amazon VPC.

The Elastic IP address attached to the file system's elastic network interface was deleted

Amazon FSx doesn't support accessing file systems from the public Internet. Amazon FSx automatically detaches any Elastic IP address which is a public IP address reachable from the Internet that gets attached to a file system's elastic network interface. For more information, see Supported clients.

The file system's VPC security group lacks the required inbound rules

Review the inbound rules specified in Amazon VPC security groups, and make sure that the security group associated with your file system has the corresponding inbound rules.

The compute instance's VPC security group lacks the required outbound rules

Review the outbound rules specified in Amazon VPC security groups, and make sure that the security group associated with your compute instance has the corresponding outbound rules.

The compute instance's subnet doesn't use any of the route tables associated with your file system

FSx for ONTAP creates endpoints for accessing your file system in a VPC route table. We recommend that you configure your file system to use all of the VPC route tables that are associated with the subnets in which your clients are located. By default, Amazon FSx uses your VPC's main route table. You can optionally specify one or more route tables for Amazon FSx to use when you create your file system.

If you can ping your file system's Intercluster endpoint but cannot ping your file system's Management endpoint (see File system resources for more information), your client is likely not in a subnet that's associated with one of your file system's route tables. To access your file system, associate one of your file system's route tables with your client's subnet. For information about updating your file system's Amazon VPC route tables, see Updating file systems.

Amazon FSx can't update route table for Multi-AZ file systems created using AWS CloudFormation

Amazon FSx manages VPC route tables for Multi-AZ file systems using tag-based authentication. These route tables are tagged with Key: AmazonFSx; Value: ManagedByAmazonFSx. When creating or updating FSx for ONTAP Multi-AZ file systems using AWS CloudFormation we recommend that you add the Key: AmazonFSx; Value: ManagedByAmazonFSx tag manually.

If you're unable to reach your Multi-AZ file system, check to see if the VPC route tables associated with the file system are tagged with Key: AmazonFSx; Value: ManagedByAmazonFSx. If they are not, then Amazon FSx cannot update those route tables to route the floating IP addresses of the management and data ports to the active file server when a failover event occurs. For information about updating your file system's Amazon VPC route tables, see Updating file systems.

Can't access a file system over iSCSI from a client in another VPC

To access a file system over the Internet Small Computer Systems Interface (iSCSI) protocol from a client in another VPC, you can configure Amazon VPC peering or AWS Transit Gateway between the VPC associated with your file system and the VPC in which your client resides. For more information, see Create and accept VPC peering connections in the Amazon Virtual Private Cloud guide.

The owning account has unshared the VPC subnet

If you created your file system in a VPC subnet that has been shared with you, the owning account may have unshared the VPC subnet.

If the owner account has unshared the VPC subnet, you will see the following message in the console for that file system:

The vpc ID vpc-012345abcde does not exist

You will need to contact the owning account so that they can re-share the subnet with you.

Can't access a file system over NFS, SMB, the ONTAP CLI, or the ONTAP REST API from a client in another VPC or on-premises

To access a file system over Network File System (NFS), Server Message Block (SMB), or the NetApp ONTAP CLI and REST API from a client in another VPC or on premises, you must configure routing using AWS Transit Gateway between the VPC associated with your file system and the network in which your client resides. For more information, see Accessing your FSx for ONTAP data.