Limit IPs or Domains for Public Embeddable Dashboards

What is the problem or goal the end user is trying to solve or accomplish?

1. If we could make a dashboard public, which we can embed using an Iframe would be great. However, there are security concerns that if someone outside the organization gets a hold of the dashboard, they will also be able to view it

How are they solving it currently?

What is the recommended solution by the Customer?

1. Be able to restrict or limit some IPs or domains for a public dashboard to stop that from happening, so the dashboards are only available within.