# 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`


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# 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.computle.com/troubleshooting/streaming-agent/nice-dcv/unable-to-connect.md?ask=<question>
```

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.