响应码：站内 4xx 错误
站内网址返回 4xx 错误，最常见的是 404（页面不存在，即死链），也包括 400、403、410、429 等。访客点到会看到错误页，搜索引擎也会浪费抓取预算。
如何修复：下方「出现在」一列给出链接所在页面、位置（页头/页脚/正文）和锚文本，到这些页面把链接改为正确地址或删除；已删除但有价值的页面可做 301 重定向到最相关的页面。403 通常是服务器拒绝了爬虫请求，在浏览器里能打开的话一般不是问题。
Screaming Frog 英文原文
Internal URLs with a client-side error. This indicates a problem occurred with the URL request and can include responses such as 400 bad request, 403 Forbidden, 404 Page Not Found, 410 Removed, 429 Too Many Requests and more. A 404 'Page Not Found' is the most common, and often referred to as a broken link. View URLs that link to errors using the lower 'inlinks' tab and export them in bulk via 'Bulk Export > Response Codes > Internal > Client Error (4xx) inlinks'.
How to fix: All links on a website should ideally resolve to 200 'OK' URLs. Errors such as a 404 or 410 should be updated to their correct locations, removed and redirected where appropriate. A 403 forbidden error occurs when a web server denies access to the SEO Spider's request and can often be resolved by switching the user-agent to Chrome via 'Config > User-Agent' and crawling again.
| 负责人 | 状态 | 备注 | |
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| 网址 | 出现在 | 首次发现 | |
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| https://www.sutongtechnology.com/cdn-cgi/l/email-protection | 217 个页面 · 正文 / · “[email protected]” /aboutus.html · “[email protected]” /blog/ · “[email protected]” …其余见 CSV | 11-03 10:56 | |
| https://www.sutongtechnology.com/metal-random-packings-37.html | 1 个页面 · 正文 /blog/column-packing-types.html · “Metal Random Packings” | 11-03 10:56 |