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<!DOCTYPE html>
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<title>fangpsh's blog</title>
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<h3 class="text-muted"><a href="/">fangpsh's blog</a></h3>
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<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2024/2024-03-19.html" rel="bookmark" title="Permalink to 关于磁盘URE的担忧">关于磁盘URE的担忧</a></h2> </header>
<div class="entry-content"> <p>网络上常见关于 磁盘URE（Unrecoverable Read Error ）的担忧，按照厂商给出的 URE数据计算 RAID5 之类的重建失败概率非常之高，例如这位知乎网友的回答<a href="https://www.zhihu.com/question/20164654">raid5 …</a></p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2024/2024-02-02.html" rel="bookmark" title="Permalink to 高质量4G代理池">高质量4G代理池</a></h2> </header>
<div class="entry-content"> <p><img alt="rasproxy" src="/assets/images/2024/20240218145733.jpg"></p>
<p>刚刚参加工作时，在某公司负责运维，常常要给爬虫组的同事找各种云的机器，ucloud、青云、阿里云、腾讯云、aws等，后来这些段被封的 …</p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2024/2024-01-22.html" rel="bookmark" title="Permalink to Type65 的未来">Type65 的未来</a></h2> </header>
<div class="entry-content"> <p>注：这是一篇 23 年8月的笔记，目前查看对应的<a href="https://datatracker.ietf.org/doc/rfc9460/?include_text=1">RFC 9460</a> 已经发布。</p>
<hr>
<p>前些日子在查看内网域名解析服务器时，发现新增了不少type65 的记录，反 …</p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2024/2024-01-11.html" rel="bookmark" title="Permalink to 为何无法杀死阿里云盾">为何无法杀死阿里云盾</a></h2> </header>
<div class="entry-content"> <p>输错 PID，给云盾进程发送了kill signal：</p>
<div class="highlight"><pre><span></span><code>root 26689 0.3 0.1 113180 9420 ? S<sl 10:34 0:08 /usr/local/aegis/aegis_client/aegis_11_83/AliYunDun
...
# kill -9 26689
-bash: kill: (26689) - Operation not permitted
</code></pre></div>
<p>咦，怎么啥不死，我是 …</p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2024/2024-01-08.html" rel="bookmark" title="Permalink to 虚拟机下USB Token使用问题">虚拟机下USB Token使用问题</a></h2> </header>
<div class="entry-content"> <p>23 年 6 月1 日之后，代码签名证书只能通过 USB Token等安全设备分发：</p>
<blockquote>
<p>As of June 1, 2023, all publicly trusted code signing certificates' keys must be stored on cryptographically secure hardware (USB tokens, hardware security modules [HSMs], etc.). The goal here is …</p></blockquote> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2023/2023-12-19.html" rel="bookmark" title="Permalink to 简易抗DDoS总结">简易抗DDoS总结</a></h2> </header>
<div class="entry-content"> <p>以下所说的方法只能应对小打小闹，骚扰型、流量型 DDoS 攻击。</p>
<ol>
<li>核心思路：服务降级，白嫖资源；</li>
<li>套CDN 之后，<a href="https://fangpsh.github.io/posts/2023/2023-10-02.html">做好源IP 隐藏</a>，源站避免 …</li></ol> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2023/2023-11-10.html" rel="bookmark" title="Permalink to 部分搜索引擎爬虫IP">部分搜索引擎爬虫IP</a></h2> </header>
<div class="entry-content"> <p>有个小项目套了一个<a href="https://waf-ce.chaitin.cn/">雷池WAF</a>，担心会影响到搜索引擎的爬虫，需要单独维护一个IP组，社区关联issue：<a href="https://github.com/chaitin/SafeLine/issues/374">[建议] 内置各大搜索引擎蜘 …</a></p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2023/2023-10-02.html" rel="bookmark" title="Permalink to 源站IP ACL绕过的风险">源站IP ACL绕过的风险</a></h2> </header>
<div class="entry-content"> <p>套上CDN 之后，CDN厂商一般会在回源时，将真实的客户端地址写入header 中，例如cloudflare 是<a href="https://developers.cloudflare.com/fundamentals/reference/http-request-headers/#cf-connecting-ip">CF-Connecting-IP</a>，阿里云是<a href="https://help.aliyun.com/zh/cdn/user-guide/configure-custom-request-headers">Ali-Cdn-Real-Ip</a>，当然也可以从X-Forwarded-For 中取。另外7层的负载均衡服务在转发时，也会携带此类header。</p>
<p>如果 …</p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2023/2023-09-27.html" rel="bookmark" title="Permalink to lvmcache性能简单测试">lvmcache性能简单测试</a></h2> </header>
<div class="entry-content"> <p>测试命令：</p>
<div class="highlight"><pre><span></span><code>fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=fiotest --filename=testfio --bs=4k --iodepth=64 --size=8G --readwrite=randrw --rwmixread=75
</code></pre></div>
<p>数据绝对值不具备参考价值，仅供娱乐，一些结论在末尾 …</p> </div><!-- entry-content -->
</article>
<article class="hentry">
<header> <h2 class="entry-title"><a href="https://fangpsh.github.io/posts/2023/2023-09-26.html" rel="bookmark" title="Permalink to lvmcache 缓存盘掉盘处理">lvmcache 缓存盘掉盘处理</a></h2> </header>
<div class="entry-content"> <p>一块老旧的SSD，使用lvmcache 作为读写缓存，今天掉盘了，系统hang 住，重启后一堆报错：<code>Warning: dracut-initqueue timeout - starting timeout scripts</code>，启动失败，自动进入了救援模式 …</p> </div><!-- entry-content -->
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