> For the complete documentation index, see [llms.txt](https://docs.9proxy.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.9proxy.com/developers/sdk/sdk-nodejs/functions/setrangeport-...args.md).

# setRangePort(...args)

Defines the range of ports available for proxy forwarding.

```javascript
setRangePort(startPort, endPort)
```

***

## Parameters

* **startPort** (<mark style="color:green;">number</mark>) – Starting port.
* **endPort** (<mark style="color:green;">number</mark>) – Ending port.

## Return Value

number or void (binding dependent).

## Example

```javascript
// example

sdk.setRangePort(10000, 20000);

```