> For the complete documentation index, see [llms.txt](https://academy.cegedim.cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://academy.cegedim.cloud/monitoring/custom-check/custom-check-faqs.md).

# Custom check - FAQs

## Custom Alarms

* **Can an Internal Custom Alarm be migrated to an External one, or vice versa?** No, for technical reasons a new alarm must be created and the old one deleted.
* **How long before a new Custom Alarm becomes operational?** It can take up to 30 minutes after creating a Custom Alarm before it can be viewed in ITCare.
* **Can I adjust the check execution frequency of a Custom Alarm?** No, the frequency is fixed at every 10 minutes for an Internal Custom Alarm and 5 minutes for an External Custom Alarm. You can request a change to these settings via the ITCare feedback button by providing your use case.
* **Can I choose the locations used for an External Custom Alarm?** No, only Paris and Marseille are currently available. You can request a change to these settings via the ITCare feedback button by providing your use case.

## Error codes — External Custom Checks

| Code | Health status           | Description                                                           |
| ---- | ----------------------- | --------------------------------------------------------------------- |
| 0    | Healthy                 | Check passed, everything working normally                             |
| 1    | SSL Communication error | Secure connection (HTTPS) could not be established                    |
| 2    | DNS query timeout       | The system took too long trying to resolve the address                |
| 3    | Unknown Host            | The address could not be found — domain name does not resolve         |
| 4    | Unexpected Error        | Something went wrong that doesn't fit a known category                |
| 5    | Redirects not allowed   | The page tried to redirect, but redirects are disabled for this check |
| 6    | Invalid Code            | The response code returned wasn't the one expected                    |
| 7    | Script execution failed | A custom script step failed to run                                    |
| 8    | Script Fail             | A custom script returned a failure                                    |
| 12   | Execution Timeout       | The whole check took too long to complete                             |
| 13   | Too many redirects      | The page redirected too many times in a row                           |
| 15   | Connection timeout      | The server did not respond in time                                    |
| 16   | Connection Refused      | The server actively rejected the connection                           |
| 17   | Constraint Violated     | The response didn't match expected content rules                      |
| 18   | Unknown Method Error    | An unrecognized function was called during the check                  |
| 20   | SSL Expiry warning      | The site's security certificate is about to expire                    |
| 24   | Request Timeout         | The request itself took too long to get a reply                       |
| 30   | Forbidden URL Error     | The address points to an internal/local address, which isn't allowed  |


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://academy.cegedim.cloud/monitoring/custom-check/custom-check-faqs.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.