<p>一、源站访问控制描述</p>
<p style="padding-left: 30px;">源站访问控制是在源服务器上设置访问控制，只允许云防御IP访问，云防御和源站联动提高防护安全性的方法。</p>
<p style="padding-left: 30px;">接入知道创宇云防御平台后，经过云防御的攻击知道创宇均会按防御级别拦截，但因源站 IP 在接入前已经暴露过，存在攻击者已经获取到源站 IP 可直接攻击源服务器的风险。因此知道创宇建议如有条件可在接入云防御后将源站服务器 IP 更换为未暴露过的IP地址，如果不具备变更源站 IP 条件，建议尽量设置访问控制，即仅允许云防御集群 IP 访问源站，最大程度保障源服务器的安全。</p>
<p>二、获取云防御集群IP</p>
<p style="padding-left: 30px;">知道创宇云防御共有6242个节点集群，每个集群背后均有多台服务器作为支撑，根据节点性能负载情况，知道创宇云防御会不定期为您选择最优节点集群。获取云防御集群IP时可登录云防御控制台，点击购买的产品，下拉框中点击【功能管理】，选择【通用设置】，进入【查看节点IP】中获取。</p>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3517" src="http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板.png" alt="" width="1315" height="139" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板.png 1315w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板-300x32.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板-768x81.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板-1024x108.png 1024w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板-60x6.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP面板-150x16.png 150w" sizes="(max-width: 1315px) 100vw, 1315px" /></p>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3520" src="http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP.png" alt="" width="782" height="618" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP.png 782w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP-300x237.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP-768x607.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP-60x47.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/查看节点IP-150x119.png 150w" sizes="(max-width: 782px) 100vw, 782px" /></p>
<p>三、配置指导</p>
<p style="padding-left: 30px;">Iptabels 是与 Linux 内核集成的包过滤防火墙系统，几乎所有的 Linux 发行版本都会包含 Iptables 的功能。Iptabels 配置简单，推荐首选在 Iptabels 中配置。</p>
<p style="padding-left: 30px;">1.配置示例：</p>
<p style="padding-left: 30px;">假设 WEB 服务监听端口为 80，使用以下命令对 80 端口进行访问限制， 其他端口类似。</p>
<blockquote>
<p style="padding-left: 30px;">iptables -I INPUT -p tcp –dport 80 -j DROP</p>
<p style="padding-left: 30px;">iptables -I INPUT -p tcp -s 1.1.1.0/24 -p tcp –-dport 80 -j ACCEPT</p>
<p style="padding-left: 30px;">iptables -I INPUT -p tcp -s 2.2.2.0/24 -p tcp –-dport 80 -j ACCEPT</p>
</blockquote>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3526" src="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源.png" alt="" width="1738" height="201" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源.png 1738w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源-300x35.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源-768x89.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源-1024x118.png 1024w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源-60x7.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables配置限源-150x17.png 150w" sizes="(max-width: 1738px) 100vw, 1738px" /></p>
<p style="padding-left: 30px;">2.策略核实：执行 iptables -L -n 命令，检查策略是否设置成功。</p>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3527" src="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查.png" alt="" width="1792" height="498" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查.png 1792w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查-300x83.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查-768x213.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查-1024x285.png 1024w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查-60x17.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源配置检查-150x42.png 150w" sizes="(max-width: 1792px) 100vw, 1792px" /></p>
<p style="padding-left: 30px;">3.验证策略是否生效：即仅ACCEPT的IP地址（云防御节点）可请求成功，其他地址均连接超时。</p>
<p style="padding-left: 60px;">a.修改本地Host文件，指定域名解析到源站IP。</p>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3575" src="http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源.png" alt="" width="1043" height="263" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源.png 1043w, http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源-300x76.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源-768x194.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源-1024x258.png 1024w, http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源-60x15.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/绑host测试限源-150x38.png 150w" sizes="(max-width: 1043px) 100vw, 1043px" /></p>
<p style="padding-left: 60px;">b.访问该域名时若出现以下报错则策略生效，若可正常访问网站则策略有误，建议核实配置情况。</p>
<p style="padding-left: 30px;"><img class="aligncenter size-full wp-image-3528" src="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图.png" alt="" width="1340" height="703" srcset="http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图.png 1340w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图-300x157.png 300w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图-768x403.png 768w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图-1024x537.png 1024w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图-60x31.png 60w, http://help.yunaq.com/wp-content/uploads/2021/07/Iptables限源效果图-150x79.png 150w" sizes="(max-width: 1340px) 100vw, 1340px" /></p>
<p>四、其他服务器</p>
<p style="padding-left: 30px;">1.常见服务器设置方法可参考：【<a href="http://help.yunaq.com/faq/2801/index.html">IIS</a>】、【<a href="http://help.yunaq.com/faq/3549/index.html">Nginx</a>】、【<a href="http://help.yunaq.com/faq/3562/index.html">Tomcat</a>】、【<a href="http://help.yunaq.com/faq/3543/index.html">Apache</a>】、【<a href="http://help.yunaq.com/faq/3566/index.html">阿里云</a>】、【<a href="http://help.yunaq.com/faq/3615/index.html">腾讯云</a>】。</p>
<p style="padding-left: 30px;">2.除上述WEB 服务器和防火墙的其他设备建议参考厂商官方指导配置或联系厂商技术支持协助。</p>


一、源站访问控制描述 源站访问控制是在源服务器上设置访问控制，只允许云防御IP访问，云防御和源站联动提高防护安 [&#8230;]

Iptables防火墙访问控制设置方法

<p style="text-align:start;text-indent:2em;">为保障客户业务系统安全，知道创宇云安全会实时对黑客攻击行业进行识别阻断。在实际运营中，我们发现部分第三方服务提供商由于请求频率、行为、特征不符合标准HTTP规范要求，而会被知道创宇防御引擎阻断拦截，从而影响业务，这其中可能涉及支付公司、API服务商、监控平台等。</p><p style="text-align:start;text-indent:2em;">考虑到客户实际需求，上述厂商，如果您的业务受到影响，可通过以下方式向知道创宇云安全发起全局白名单申请。</p><p style="text-align:start;text-indent:2em;">厂商请以公函形式向我们发起申请，申请内容应至少包括以下内容：</p><p style="text-align:start;text-indent:2em;">1、涉及到申请加白的IP地址列表。</p><p style="text-align:start;text-indent:2em;">2、IP地址用途说明，并附至少1例拦截样例，包括被阻断的IP地址、时间、触发拦截的URL地址、现象（403阻断、IP封禁）等。</p><p style="text-align:start;text-indent:2em;">3、预计上述IP用作上述用途的截止时间。</p><p style="text-align:start;text-indent:2em;">4、厂商应承诺遵守《网络安全法》等法律法规规定，不得利用IP白名单对知道创宇用户发起任何形式的攻击。如涉嫌危害用户安全或涉嫌违法，知道创宇有权将上述IP白名单移除，并由厂商承担因此造成的一切损失与责任。</p><p style="text-align:start;text-indent:2em;">5、联系方式（联系人、电话）</p><p style="text-align:start;text-indent:2em;">6、加盖公司公章。</p><p style="text-align:start;text-indent:2em;">请以公司身份，将申请厂商营业执照电子版及公函发送至 zxyy@knownsec.com 。如因客户安全需求，自行开通了知道创宇云安全高级防护策略，造成的拦截，知道创宇将不会给予加白。</p><p style="text-align:start;text-indent:2em;">如果涉及知道创宇用户较少，厂商可以直接联系客户，在知道创宇云安全控制面板中自行添加针对本网站的白名单即可。</p>

为保障客户业务系统安全，知道创宇云安全会实时对黑客攻击行业进行识别阻断。

知道创宇云安全全局IP白名单申请流程

<h3 id="httpdnsAPI文档-API参考：">一、API接口</h3>
<ul>
<li>入口：<a class="external-link" href="http://dns.kangdbao.net/" rel="nofollow">dns.kangdbao.net</a></li>
<li>协议：支持HTTP/HTTPS协议</li>
</ul>
<h3>二、URL形式</h3>
<ul>
<li><a class="external-link" href="http://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s" rel="nofollow">http(s)://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s</a></li>
<li>HTTP GET请求</li>
</ul>
<h3 id="httpdnsAPI文档-请求参数说明：">三、请求参数说明</h3>
<table class="relative-table confluenceTable tablesorter tablesorter-default stickyTableHeaders">
<thead class="tableFloatingHeaderOriginal">
<tr class="tablesorter-headerRow">
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="0">
<div class="tablesorter-header-inner">
<p>参数</p>
</div>
</th>
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="1">
<div class="tablesorter-header-inner">
<p>含义</p>
</div>
</th>
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="2">
<div class="tablesorter-header-inner">
<p>必填</p>
</div>
</th>
</tr>
</thead>
<tbody>
<tr>
<td class="confluenceTd"><strong>host</strong></td>
<td class="confluenceTd"><strong>待查询的域名</strong></td>
<td class="confluenceTd"><b>Y</b></td>
</tr>
<tr>
<td class="confluenceTd"><strong>account_id</strong></td>
<td class="confluenceTd"><strong>md5sum格式账户id，如“21de58ae91bf3ab77e32aeb8fae95291”</strong></td>
<td class="confluenceTd"><b>Y</b></td>
</tr>
<tr>
<td class="confluenceTd" colspan="1"><strong>t</strong></td>
<td class="confluenceTd" colspan="1"><strong>鉴权签名失效时间，最大为now()+600，如&#8221;1576468800&#8243;</strong></td>
<td class="confluenceTd" colspan="1"><b>Y</b></td>
</tr>
<tr>
<td class="confluenceTd" colspan="1"><strong>sign</strong></td>
<td class="confluenceTd" colspan="1"><strong>鉴权签名，sign = md5sum(&#8220;host-secret-t&#8221;)</strong></td>
<td class="confluenceTd" colspan="1"><b>Y</b></td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">out</td>
<td class="confluenceTd" colspan="1">输出格式，可选json、text，默认为json</td>
<td class="confluenceTd" colspan="1">N</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">ip</td>
<td class="confluenceTd" colspan="1">发起edns请求的ip，不填则为客户端真实ip（仅支持IPv4格式）</td>
<td class="confluenceTd" colspan="1">N</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">qtype</td>
<td class="confluenceTd" colspan="1">查询记录的类型，可选A、AAAA默认为A</td>
<td class="confluenceTd" colspan="1">N</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">ttl</td>
<td class="confluenceTd" colspan="1">输出包含ttl，可选1、0，默认为0不输出ttl</td>
<td class="confluenceTd" colspan="1">N</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">encrypt</td>
<td class="confluenceTd" colspan="1">响应包体是否加密，可选1、0，默认为0即不对响应包体加密</td>
<td class="confluenceTd" colspan="1">N</td>
</tr>
</tbody>
</table>
<ul>
<li>account_id：系统为用户随机生成的唯一id，为md5sum格式，如&#8221;21de58ae91bf3ab77e32aeb8fae95291&#8243;</li>
<li>t：鉴权签名失效时间，为1970年1月1日以来的秒数，最大值为now()+600。如t=1576468800表示签名在2019-12-16 12:00:00过期。</li>
<li>sign：鉴权签名。sign = md5sum(&#8220;host-secret-t&#8221;)。对于host=<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>，secret=oB1q6EF8rGUpd1qxBtcm，t=1576468800的情况，sign=md5sum(&#8220;<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>-oB1q6EF8rGUpd1qxBtcm-1576468800&#8243;)，则sign取值为1f8c93f4853b8a9cc179b54ea7e0e2f6。secret是系统为用户随机生成长度为20的密钥，每个用户最多存在两个密钥。</li>
<li>encrypt：encrypt为1时，响应包体以 <a class="external-link" href="https://gitlab.intra.knownsec.com/jiasule/jsl-httpdns/merge_requests/5" rel="nofollow">AES-256-ECB</a>方式进行加密，加密密钥与请求的签名密钥相同，签名密钥为20字符，加密时使用pkcs7padding的16字节方式对密钥进行补齐，即加密密钥从20个字符填充到32个字符。</li>
</ul>
<h3 id="httpdnsAPI文档-响应格式：" class="p1">四、响应格式</h3>
<ul>
<li class="p1">json格式</li>
</ul>
<ol>
<li>查询成功返回格式：{&#8220;ipsv6&#8221;:[&#8220;2408:8741:0:1:0:0:0:27&#8243;],&#8221;ttl&#8221;:144,&#8221;host&#8221;:&#8221;<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>&#8220;}</li>
<li>未查询到结果返回格式：{}</li>
<li class="p1">请求错误返回格式：{&#8220;code&#8221;:&#8221;SignatureExpired&#8221;}</li>
</ol>
<div class="table-wrap"></div>
<div class="table-wrap">
<table class="relative-table confluenceTable tablesorter tablesorter-default stickyTableHeaders">
<colgroup>
<col />
<col /></colgroup>
<thead class="tableFloatingHeaderOriginal">
<tr class="tablesorter-headerRow">
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="0">
<div class="tablesorter-header-inner">参数</div>
</th>
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="1">
<div class="tablesorter-header-inner">含义</div>
</th>
</tr>
</thead>
<tbody>
<tr>
<td class="confluenceTd">host</td>
<td class="confluenceTd">查询的域名</td>
</tr>
<tr>
<td class="confluenceTd">ttl</td>
<td class="confluenceTd">该域名解析结果的TTL缓存时间</td>
</tr>
<tr>
<td class="confluenceTd">ips/ipsv6</td>
<td class="confluenceTd">解析到的A/AAAA记录</td>
</tr>
</tbody>
</table>
</div>
<ul>
<li> text格式</li>
</ul>
<ol>
<li class="p1">查询成功返回格式：183.212.96.233,111.212.98.126;187（多个地址使用&#8221;,&#8221;分割，ttl使用&#8221;;&#8221;分割）</li>
<li class="p1">未查寻到结果返回格式：null</li>
<li class="p1">请求错误返回格式：{&#8220;code&#8221;:&#8221;SignatureExpired&#8221;}</li>
</ol>
<h3 id="httpdnsAPI文档-状态码：" class="p1">五、状态码</h3>
<div class="table-wrap">
<table class="relative-table confluenceTable tablesorter tablesorter-default stickyTableHeaders">
<colgroup>
<col />
<col />
<col /></colgroup>
<thead class="tableFloatingHeaderOriginal">
<tr class="tablesorter-headerRow">
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="0">
<div class="tablesorter-header-inner">
<p>状态码</p>
</div>
</th>
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="1">
<div class="tablesorter-header-inner">
<p>HTTP状态码</p>
</div>
</th>
<th class="confluenceTh tablesorter-header sortableHeader tablesorter-headerUnSorted" tabindex="0" scope="col" data-column="2">
<div class="tablesorter-header-inner">
<p>描述</p>
</div>
</th>
</tr>
</thead>
<tbody>
<tr>
<td class="confluenceTd">MissingArgument</td>
<td class="confluenceTd">403</td>
<td class="confluenceTd">缺少必要参数</td>
</tr>
<tr>
<td class="confluenceTd">InvalidParam</td>
<td class="confluenceTd">403</td>
<td class="confluenceTd">参数格式不合法</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">InvalidSignature</td>
<td class="confluenceTd" colspan="1">403</td>
<td class="confluenceTd" colspan="1">签名校验错误</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">SignatureExpired</td>
<td class="confluenceTd" colspan="1">403</td>
<td class="confluenceTd" colspan="1">签名时间戳过期</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">DnNotInWhitelist</td>
<td class="confluenceTd" colspan="1">403</td>
<td class="confluenceTd" colspan="1">域名不在用户白名单内</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">InvalidAccountId</td>
<td class="confluenceTd" colspan="1">403</td>
<td class="confluenceTd" colspan="1">账户id不存在</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">InvalidUrlPath</td>
<td class="confluenceTd" colspan="1">404</td>
<td class="confluenceTd" colspan="1">请求路径不存在</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">MethodNotAllowed</td>
<td class="confluenceTd" colspan="1">405</td>
<td class="confluenceTd" colspan="1">不支持的HTTP方法</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">AccessRestricted</td>
<td class="confluenceTd" colspan="1">503</td>
<td class="confluenceTd" colspan="1">请求过于频繁或并发连接数过多被拒绝</td>
</tr>
<tr>
<td class="confluenceTd" colspan="1">InternalError</td>
<td class="confluenceTd" colspan="1">500</td>
<td class="confluenceTd" colspan="1">服务端内部错误</td>
</tr>
</tbody>
</table>
</div>
<h3>六、使用示例</h3>
<ul>
<li>常规使用示例</li>
</ul>
<div class="table-wrap">
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<pre># -*- coding:utf-8 -*-
import requests
import time
import hashlib

ip = "1.2.3.4"
host = "<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>"
secret = "oB1q4EF8rGUpd2qxBtcm"
expiration_time = str(int(time.time())+600)
account_id = "7cf125ce0190b2fe2bb6bbb6ab386c15"
sign_str = host + "-" + secret + "-" + expiration_time
sign = hashlib.md5(sign_str.encode(encoding='UTF-8')).hexdigest()
url_tmp = "<a class="external-link" href="http://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s" rel="nofollow">http://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s</a>"
uri = url_tmp % (host, account_id, sign, expiration_time, ip)
r = requests.get(uri)
print(r.text)
-------------------------------------------------------------------------------------------------------
output:
{"host":"<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>","ips":["111.212.98.126","122.218.238.112"]}</pre>
</td>
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<ul>
<li>响应加密示例</li>
</ul>
<pre>encrypt==1时，响应包体使用<a class="external-link" href="https://gitlab.intra.knownsec.com/jiasule/jsl-httpdns/merge_requests/5" rel="nofollow">AES-256-ECB</a>方式加密，同时包体也使用pkcs7padding的16字节方式对齐。由于加密后的密文不都是可打印的，所以响应包体是由密文转换而来的16进制字符串，转换过程中每个密文字节由两个十六进制字符表示，如密文为"0123456789abcdef"则转换为十六进制字符串后为"30313233343536373839414243444546"。因此解密时需要先将十六进制字符串响应包体转换为原始密文。</pre>
<div class="table-wrap">
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<pre># -*- coding:utf-8 -*-
import re
import requests
import time
import hashlib
from Crypto.Cipher import AES

ip = "1.2.3.4"
host = "www.yunaq.com"
secret = "TQ3hq6bkp5gmbXNJOJ13"
expiration_time = str(int(time.time())+600)
account_id = "48c1a96381fbcad1e63c435a44d52713"
sign_str = host + "-" + secret + "-" + expiration_time
sign = hashlib.md5(sign_str.encode(encoding='UTF-8')).hexdigest()
url_tmp = "http://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s&amp;encrypt=1"

def hex2str(s):
    hex_list = re.findall(r'.{2}', s)  # 按两个字符切分
    return ''.join([chr(int(i, 16)) for i in hex_list])

# pkcs7填充，block_size为16
def pkcs7_padding(text):
    amount_to_pad = 16 - (len(text) % 16)

    if amount_to_pad == 0:
        amount_to_pad = 16
    pad = chr(amount_to_pad)
    return text + pad * amount_to_pad

uri = url_tmp % (host, account_id, sign, expiration_time, ip)
r = requests.get(uri)
if r.status_code != 200:
    print(r.text)
    exit()

# 将密钥填充到32个字符,即使用AES-256
key = pkcs7_padding(secret)
aes = AES.new(str.encode(key), AES.MODE_ECB)
encrypted_text = hex2str(r.text)
decrypted_text = aes.decrypt(encrypted_text)
# 去除pkcs7填充的字符
amount_to_pad = ord(decrypted_text[-1])
res = decrypted_text[0:0-amount_to_pad]
print(res)
-------------------------------------------------------------------------------------------------------、
output:
{"host":"<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>","ips":["121.212.98.126","122.218.38.112"]}</pre>
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<h3 id="httpdnsAPI文档-请求实例：">七、实例演示</h3>
<p>请求：<a class="external-link" href="http://127.0.0.1/sign_d?host=www.yunaq.com&amp;account_id=123456&amp;t=1576468800&amp;sign=1f8c93f4853b8a9cc179b54ea7e0e2f6&amp;ip=192.168.12.4" rel="nofollow">http://</a><a class="external-link" href="http://dns.kangdbao.net/sign_d?host=%s&amp;account_id=%s&amp;sign=%s&amp;t=%s&amp;ip=%s" rel="nofollow">dns.kangdbao.net</a><a class="external-link" href="http://127.0.0.1/sign_d?host=www.yunaq.com&amp;account_id=123456&amp;t=1576468800&amp;sign=1f8c93f4853b8a9cc179b54ea7e0e2f6&amp;ip=192.168.12.4" rel="nofollow">/sign_d?host=www.yunaq.com&amp;account_id=21de58ae91bf3ab77e32aeb8fae95291&amp;t=1576468800&amp;sign=1f8c93f4853b8a9cc179b54ea7e0e2f6&amp;ip=192.168.12.4</a></p>
<p class="p1">响应：{&#8220;host&#8221;:&#8221;<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>&#8220;,&#8221;ips&#8221;:[&#8220;122.218.238.109&#8243;,&#8221;183.212.96.249&#8221;]}</p>
<p class="p1">请求：<a class="external-link" href="http://dns.kangdbao.net/sign_d?host=www.yunaq.com&amp;account_id=7cf115ce0790b2fe2bb6bbb6ab486c45&amp;sign=6826ac4c4d9031d07607e8ea44e762ef&amp;t=1577254142&amp;qtype=AAAA&amp;ttl=1" rel="nofollow">http://dns.kangdbao.net/sign_d?host=www.yunaq.com&amp;account_id=21de58ae91bf3ab77e32aeb8fae95291&amp;sign=6826ac4c4d9031d07607e8ea44e762ef&amp;t=1577254142&amp;qtype=AAAA&amp;ttl=1</a></p>
<p class="p1">响应：{&#8220;ipsv6&#8221;:[&#8220;2308:871c:0:1:0:0:0:27&#8243;],&#8221;ttl&#8221;:144,&#8221;host&#8221;:&#8221;<a class="external-link" href="http://www.yunaq.com/" rel="nofollow">www.yunaq.com</a>&#8220;}</p>
<h3><strong>八、注意事项</strong></h3>
<ul>
<li>httpdns会缓存查询结果，当用户更新httpdns的相关配置如密钥或根域名时，最长需要等待2分钟才能生效。</li>
<li>当前仅支持IPv4客户端接入。</li>
</ul>


一、API接口 入口：dns.kangdbao.net 协议：支持HTTP/HTTPS协议 二、URL形式 h [&#8230;]

HTTPDNS API文档

<p>净网盾共包含8类词库：反动类、涉黑类、涉黄类、暴恐类、博彩类、民生类、其他类，以下为查看这八类词库释义的方法。</p>
<p>操作步骤：（截图以谷歌浏览器为例，其他浏览器操作类似）</p>
<ol>
<li>登录【知道创宇云防御平台】后，在页面顶部的导航栏中，单击【控制台】按钮，进入控制台首页。</li>
<li>在页面顶部的导航栏中，将鼠标悬停在【产品控制面板】按钮上，弹出下拉菜单。</li>
<li>在下拉菜单中单击【净网盾】，进入净网盾功能配置页面，如下图所示。<img class="alignnone  wp-image-2048" src="http://help.yunaq.com/wp-content/uploads/2020/07/1.png" alt="" width="916" height="462" srcset="http://help.yunaq.com/wp-content/uploads/2020/07/1.png 1919w, http://help.yunaq.com/wp-content/uploads/2020/07/1-300x151.png 300w, http://help.yunaq.com/wp-content/uploads/2020/07/1-768x387.png 768w, http://help.yunaq.com/wp-content/uploads/2020/07/1-1024x516.png 1024w, http://help.yunaq.com/wp-content/uploads/2020/07/1-60x30.png 60w, http://help.yunaq.com/wp-content/uploads/2020/07/1-150x76.png 150w" sizes="(max-width: 916px) 100vw, 916px" /></li>
<li>在下拉框中选择任意域名和主机名。</li>
<li>在【页面内容监测】或【上传内容监测】的设置框中单击【词库设置】后的【修改】按钮，如图所示。<img class="alignnone  wp-image-2049" src="http://help.yunaq.com/wp-content/uploads/2020/07/2.png" alt="" width="905" height="455" srcset="http://help.yunaq.com/wp-content/uploads/2020/07/2.png 1918w, http://help.yunaq.com/wp-content/uploads/2020/07/2-300x151.png 300w, http://help.yunaq.com/wp-content/uploads/2020/07/2-768x386.png 768w, http://help.yunaq.com/wp-content/uploads/2020/07/2-1024x515.png 1024w, http://help.yunaq.com/wp-content/uploads/2020/07/2-60x30.png 60w, http://help.yunaq.com/wp-content/uploads/2020/07/2-150x75.png 150w" sizes="(max-width: 905px) 100vw, 905px" /></li>
<li>进入词库设置界面后，将鼠标悬停在每类词库名称后面的“？”图标上，即可查看该类词库释义。</li>
</ol>


净网盾共包含8类词库：反动类、涉黑类、涉黄类、暴恐类、博彩类、民生类、其他类，以下为查看这八类词库释义的方法。 [&#8230;]

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如何查看词库释义

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