> For the complete documentation index, see [llms.txt](https://docs.pynt.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pynt.io/documentation/api-security-testing/pynt-scans-troubleshooting/pynt-for-postman-troubleshooting/troubleshoot-unresolved-target-domain-error.md).

# Troubleshoot Unresolved Target Domain Error

{% hint style="danger" %}
**At a Glance**: 🌐 This error in Pynt indicates that the domain name of your API target cannot be resolved, preventing the security scan from running. Use this guide to troubleshoot and resolve domain name resolution issues, ensuring your scans can be completed successfully.
{% endhint %}

***

## Error: The target domain was unresolved

### What Happened?

The host for the test is not reachable from Pynt’s container.

Pynt couldn’t resolve the test target’s domain name to an IP or otherwise couldn’t communicate with the server.

### How to Resolve?

1. **Use "localhost"** instead of IP (e.g., "127.0.0.1") for a server running locally.
2. **Select Correct Environment**: Ensure the correct environment is selected in Postman UI.
3. **Verify Domain Reachability**: Run the test collection in Postman and confirm there are no "DNS Lookup Failed" errors.
4. **Check from Docker**: Run the following commands in a terminal to check if the domain is accessible from the Docker container:

```bash
docker run -it alpine:latest /bin/sh
ping <THE TEST DOMAIN>
```

Ensure no "Name or service not known" error messages are received.

***

{% hint style="info" %}
For additional support, visit [Pynt Community Support](https://www.pynt.io/community).
{% endhint %}


---

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