> For the complete documentation index, see [llms.txt](https://docs.computle.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.computle.com/troubleshooting/streaming-agent/nice-dcv/unable-to-connect.md).

# Unable To Connect

**Network requirements**

* You must be able to access port 8443.
* You must be able to access *\*.computle.net* and *\*.computle.com.*

If you use security solutions such as Zscaler, please ensure that you whitelist these domains.

**PowerShell**

To test connectivity, you can run the following PowerShell command, replacing "machine.computle.net" with your machine ID:

`Test-NetConnection -ComputerName machine.computle.net -Port 8443`

**Web browser**

On instances where the web client is enabled, you can navigate to the following webpage, replacing "machine.computle.net" with your machine ID. This will present a NICE DCV connection screen.

`https://machine.computle.net:8443`