> For the complete documentation index, see [llms.txt](https://waf-doc.inext.checkpoint.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://waf-doc.inext.checkpoint.com/troubleshooting/waf-gateway-virtual-machine.md).

# 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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