##  [Using DXPR Builder behind a firewall](/hc/documentation/learn-dxpr-builder/getting-started/using-dxpr-builder-behind-firewall) 

To use DXPR Builder from behind a firewall, the server's firewall rules must allow the product to connect to our servers. In case your browser is also behind a firewall, this firewall must be configured to let the browser connect to cdn.dxpr.com.



## Browser to DXPR firewall exceptions

For DXPR products to function your browser must be able to connect to the following URIs:

- **https://cdn.dxpr.com/\***



## Server to DXPR firewall exceptions

For DXPR products to function your server must be able to connect to the following URIs:

- **https://dxpr.com/api/\***