# 出错信息

| 出错代码 | 描述                                       |
| ---- | ---------------------------------------- |
| 400  | 错误请求：没有可连接的主机或请求格式不正确，包括 URL。            |
| 403  | 由于内容限制，网站被 NetNut 屏蔽。                    |
| 407  | 访问网站时代理身份验证错误。 检查用户名或密码是否有效。             |
| 490  | 接入点无效或不正确 – 可能是该国家/地区没有可用的 IP、不存在的组。     |
| 500  | 内部服务器错误 – 稍后重试请求。                        |
| 502  | 错误网关：分配的 IP 不再可用。等待系统自动分配新的IP或切换到新的会话ID。 |
| 503  | 代理错误或连接被目标站点拒绝。                          |
| 522  | 连接超时：代理服务器未及时收到响应。请重试。                   |


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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://help.netnut.io/netnut-documentation/netnut-documentation-chn/netnut-dai-li/jing-tai-zhu-zhai-dai-li/chu-cuo-xin-xi.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.