# How to perform IP address mapping with Progress database

To establish communication between a pipeline and a database through a VPN (Virtual Private Network), the IP address (location where the database is installed) must be provided. 

When using the **Progress database**, it’s also necessary to inform the range of ports defined by `-minport` and `-maxport`. If the script that loads the database doesn’t specify those two parameters, their default values as defined by the Progress database will be:

* Ports 1025 to 2000 for Unix/Linux
* Ports 3000 to 5000 for Windows.

To request an IP address mapping to connect through a VPN, [contact the Digibee Support team](https://docs.digibee.com/documentation/troubleshooting/help-and-faq/support) via chat on our Platform.