---
title: "Usage"
slug: "on-prem-connectivity-usage"
updated: 2026-10-02T16:50:35Z
published: 2026-10-02T16:50:35Z
canonical: "help.nucleussec.com/on-prem-connectivity-usage"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.nucleussec.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Usage

Important

You will need to complete the entirety of the On-Prem Connectivity Utility Setup document before attempting this section. If you have not yet set up the internal On-Prem Connectivity Utility, this will not work.

## Nucleus Connector set up

1. From the **Project Administration > Connector Setup** page within a project, click on the icon of the scanning tool you want to set up.
2. Complete the setup of your connector using the example below. The only change will be to use the url of the FQDN details and the port you assigned to the connection.

**Example:**

1: Select the regional FQDN to use (should match the region in your .ini file for the On-Prem Connectivity Utility):

| Region | Tunnel Hostname |
| --- | --- |
| US | `tunnel.us.nucleus.internal` |
| EU | `tunnel.eu.nucleus.internal` |
| Australia | `tunnel.aus.nucleus.internal` |
| UK | `tunnel.uk.nucleus.internal` |
| Government | `tunnel.nucleusgov.internal` (or simply `tunnel`) |

2: Port you assigned to the connection (Use the assigned Nucleus port from previous document): 1234

So your connector setup would look like the following:

![Image](https://cdn.document360.io/3888970a-6501-459e-acc9-c47b71c6d64c/Images/Documentation/connector_ui_utility(1).png)

1. Click **Save Connection**
2. Once you get verification that the connector was saved, click **Test Connection** and wait for verification that the connection was successful.

You're all done! You are now running your connector through the On-Prem Connectivity Utility to access your internal scanner.

Repeat these steps for all internal scanning tools linked to the On-Prem Connectivity Utility.

## Troubleshooting Nucleus Connector set up using On-Prem Connectivity Utility

If you are having issues with the connection, make sure the utility is running successfully and use the checklist at the bottom of [the On-Prem Connectivity Utility Installation guide](https://help.nucleussec.com/docs/on-prem-utility-install) to troubleshoot the connection.

If you need any assistance, we're always read to help at: support@nucleussec.com