> For the complete documentation index, see [llms.txt](https://developers.oxylabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.oxylabs.io/products/cn/dai-li/dedicated-datacenter-proxies/enterprise/response-codes.md).

# 响应代码

以下是使用 Oxylabs 数据中心代理时最常见的响应代码。如果您收到其他响应代码，请联系您的专属客户经理以获取更多信息。

<table><thead><tr><th width="166">响应码</th><th width="268.3177083333333">错误消息</th><th>说明</th></tr></thead><tbody><tr><td><code>400</code></td><td><code>错误请求</code></td><td>无法理解该请求。请检查请求格式是否正确。</td></tr><tr><td><code>403</code></td><td><code>禁止访问</code></td><td>访问被拒绝：目标受限。如果您有任何问题，请联系支持或您的客户经理。</td></tr><tr><td><code>404</code></td><td><code>未找到</code></td><td>指定的域名未找到，或资源不可用。</td></tr><tr><td><code>407</code></td><td><code>代理认证要求</code></td><td>未提供用户凭据 / 凭据不正确 / 用户正在从未列入白名单的 IP 连接。</td></tr><tr><td><code>429</code></td><td><code>请求过多</code></td><td>用户已达到线程/并发会话限制。</td></tr><tr><td><code>500</code></td><td><code>服务器内部错误</code></td><td>我们的服务器出现了问题。请稍后再试。</td></tr><tr><td><code>502</code></td><td><code>错误网关</code></td><td>代理收到了来自上游服务器或目标服务器的无效响应。</td></tr><tr><td><code>503</code></td><td><code>服务不可用</code></td><td>无法连接到目标服务器。解析目标服务器地址时 DNS 失败。</td></tr><tr><td><code>504</code></td><td><code>网关超时</code></td><td>代理服务器等待目标服务器响应时超时。通常需要约 60 秒。</td></tr></tbody></table>


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# 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 dynamically by asking a question.

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

```
GET https://developers.oxylabs.io/products/cn/dai-li/dedicated-datacenter-proxies/enterprise/response-codes.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.