# WAF Gateway / Virtual Machine

**List of troubleshooting guides under this section:**

CloudGuard WAF Gateway in Azure Troubleshooting Guides:

{% content-ref url="/pages/8deUkB2tXZgxAGfPnv9c" %}
[Azure](/troubleshooting/waf-gateway-virtual-machine/azure.md)
{% endcontent-ref %}

General CloudGuard WAF Gateway Troubleshooting Guides:

{% content-ref url="/pages/vqD5Ob4RVVJUFTWV5kvI" %}
[NGINX Error: Upstream Sent Too Big Header While Reading Response Header from Upstream](/troubleshooting/waf-gateway-virtual-machine/nginx-error-upstream-sent-too-big-header-while-reading-response-header-from-upstream.md)
{% endcontent-ref %}

{% content-ref url="/pages/MeMyUGWub42sqf3gPaef" %}
[How To: Compare Between the Gateway's Certificate and the Upstream Certificate](/troubleshooting/waf-gateway-virtual-machine/how-to-compare-between-the-gateways-certificate-and-the-upstream-certificate.md)
{% endcontent-ref %}


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://waf-doc.inext.checkpoint.com/troubleshooting/waf-gateway-virtual-machine.md?ask=<question>
```

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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.