check web redirect url status code checker

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Raw HTML code
502 Bad Gateway - clscl.com
HTTP Status: 502
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Apache
P3P: CP="CAO PSA OUR"
Set-Cookie: _d_id=edf803bc53ca2010900932e993e6e3; Path=/; HttpOnly; SameSite=Lax
Date: Sat, 10 May 2025 07:55:49 GMT
Content-Length: 3568

HTTP Code 502 Bad Gateway

502 status code indicates that the server acting as a gateway or proxy received an invalid response from an upstream server.

When is Code 502 used?

  • When a server is down or unreachable
  • When there is a misconfiguration in server settings
  • When a reverse proxy or load balancer fails to connect to the backend server

What does Code 502 mean for the user?

The user cannot access the requested resource due to a temporary issue between servers.

GET / HTTP/1.1
Host: clscl.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html>

<head>
<style>
a:link			{font:9pt/12pt 宋体; color:red}
a:visited		{font:9pt/12pt 宋体; color:#4e4e4e}
</style>
<meta HTTP-EQUIV="Content-Type" Content="text-html; charset=gb2312">
<title>找不到服务器</title>
</head>

<body bgcolor="white">

<table width="400" cellpadding="3" cellspacing="5">
  <tr>
    <td id="tableProps" valign="top" align="left"><img id="pagerrorImg" SRC="res://shdoclc.dll/pagerror.gif"
    width="25" height="33"></td>
    <td id="tableProps2" align="left" valign="middle" width="360"><h1 id="textSection1"
    style="COLOR: black; FONT: 13pt/14pt 宋体"><span id="errorText">无法显示网页</span></h1>
    </td>
  </tr>
  <tr>
    <td id="tablePropsWidth" width="400" colspan="2"><font
    style="COLOR: black; FONT: 8pt/11pt verdana">您正在查找的页当前不可用。
    网站可能遇到支持问题，或者您需要
    调整您的浏览器设置。</font></td>
  </tr>
  <tr>
    <td id="tablePropsWidth" width="400" colspan="2"><font id="LID1"
    style="COLOR: black; FONT: 9pt/12pt 宋体"><hr color="#C0C0C0" noshade>
    <p id="LID2">请尝试以下操作:</p><ul>
      <li id="instructionsText1">单击
      <a xhref="javascript:location.reload()" target="_self">
      <img border=0 src="res://shdoclc.dll/refresh.gif" width="13" height="16"
        alt="refresh.gif (82 字节)" align="middle"></a> <a xhref="javascript:location.reload()" target="_self">刷新</a>按钮，或稍后重试。<br>
      </li>
      
      <li id="instructionsText2">如果您已经在地址栏中输入该网页的地址，
        请确认其拼写正确。<br>
      </li>
      <li id="instructionsText3">要检查您的网络连接，请单击<b>工具</b>菜单，然后单击
        <b>Internet 选项</b>。在<b>连接</b>选项卡上，单击<b>设置</b>。
        设置必须与您的局域网 (LAN) 管理员或 Internet 服务供应商 (ISP) 提供的一致。 </li>
     <li ID="list4">查看您的 Internet 连接设置是否正确被检测。您可能设置让 Microsoft Windows 检查您的网站并自动发现网络连接设置(如果您的网络管理员已经启用此设置)。
        <OL> 
        <li id="instructionText6">单击<b>工具</b>菜单，然后单击<B>Internet 选项</b>。 </li>
        <li id="instructionText7">在<b>连接</b>选项卡上，单击<b>LAN 设置</b>。</li> 
        <li id="instructionText8">选择<b>自动检测设置</b>，然后单击<b>确定</b>。</li>
        </OL>
      </li>
    <li id="instructionsText5">
       某些站点要求 128-位的连接安全性。单击<b>帮助</b>菜单，然后单击<b>关于 Internet Explorer</b> 可以查看您所安装的安全强度。
    </li>
    <li id="instructionsText4">
       如果您要访问某安全站点，请确保您的安全设置能够支持。请单击<B>工具</b>菜单，然后单击 <b>Internet 选项</b>。在“高级”选项卡上，滚动到“安全”部分，复选 SSL 2.0、SSL 3.0、TLS 1.0、PCT 1.0 设置。 
    </li>
     <li id="list3">单击<a href="javascript:history.back(1)"><img valign=bottom border=0 src="res://shdoclc.dll/back.gif">上一步</a>按钮，尝试其他链接。 </li>    
      
      
    </ul>
    <p><br>
    </p>
    <h2 id="IEText" style="font:9pt/12pt 宋体; color:black">找不到服务器或 DNS 错误<BR> Internet Explorer clscl.com
	
    </h2>
    </font></td>
  </tr>
</table>
</body>
</html>

Whois info of domain

Domain Name: CLSCL.COM
Registry Domain ID: 1572577408_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.zzy.cn
Registrar URL: http://www.zzy.cn
Updated Date: 2023-10-07T01:36:35Z
Creation Date: 2009-10-17T06:56:38Z
Registry Expiry Date: 2025-10-17T06:56:38Z
Registrar: Xiamen ChinaSource Internet Service Co., Ltd
Registrar IANA ID: 1366
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +86.5922958888
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS7.CNOLNIC.NET
Name Server: NS8.CNOLNIC.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2025-05-10T07:55:38Z <<<
For more information on Whois status codes, please visit https://icann.org/epp
NOTICE: The expiration date displayed in this record is the date the
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