ALERT: Datto Drive Cloud service will no longer be available as of July 1, 2019. For more information, see our end-of-life article. If you'd like to migrate your data to Datto Workplace, see our migration guide.
To learn how to download your Datto Drive Cloud data, please visit this article.

Remote Web: "An error occurred..."



When you try to remotely connect to your Datto appliance's GUI, you see the error message, "An error occurred..."


  • Datto SIRIS
  • Datto ALTO
  • Datto NAS


  • The backup appliance is unable to communicate with Datto's Remote Web servers.


Datto appliances communicate with a distributed, global network of communication nodes to check in with cloud servers and enable remote management. If your Datto appliance is unable to communicate with this network, Remote Web access will fail.

To resolve the issue described in this article, perform the following steps:

1. Ensure that your Datto device is powered on and connected to your network.

2. Ensure that the Datto appliance's networking environment meets Datto's whitelist requirements for communication with the Remote Web server:

  • IP ranges
    •, port 443 and port 80
    •, port 80
  • Domains: dlt-rly-* / fra-rly-* / syd-rly-* (* is a wild card; these domains will continue to expand)

3. Attempt remote access to your device again.

Additional Resources

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