> 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/proxies/dedicated-isp-proxies/self-service/response-codes.md).

# 响应码

了解独享ISP代理常见的响应码和错误及其含义。

这些是在使用 Oxylabs 独享ISP代理时可能遇到的最常见响应代码。

<table><thead><tr><th width="166">响应码</th><th width="254.33333333333331">错误消息</th><th>描述</th></tr></thead><tbody><tr><td><code>407</code></td><td><code>需要代理身份验证</code></td><td>未提供用户凭据 / 凭据不正确 / 用户正从未列入白名单的 IP 连接。</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。通常大约需要 60 秒。</td></tr><tr><td><code>503</code></td><td><code>服务不可用</code></td><td>连接目标服务器失败。解析目标服务器地址时发生 DNS 失败。</td></tr><tr><td><code>404</code></td><td><code>未找到</code></td><td>无法找到指定的域名。</td></tr><tr><td><code>500</code></td><td><code>内部服务器错误</code></td><td>我们的服务器出现了问题。请稍后再试。</td></tr><tr><td><code>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></tbody></table>


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# Agent Instructions
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## Querying This Documentation
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