# 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](/documentation/troubleshooting/help-and-faq/support.md) via chat on our Platform. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.digibee.com/documentation/troubleshooting/connectivity-guides/ip-progressdb.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.