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<title>squid问题-域名解析</title>
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<h1>squid问题-域名解析 <small></small></h1>
<div class="date"><span>03 November 2009</span></div>
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<p>今天有老客户下单修改源IP地址1.2.3.4为1.2.3.7,一切正常操作过后进行测试,其中有台机器就是狂报404。
在用/home/squid/bin/squidclient -p 80 -m PURGE http://测试url
命令清除缓存,甚至重启dns/squid服务后,其测试访问的first-to-parent地址还是1.2.3.4!!</p>
<p>用dig检查确认内部DNS配置已经生效后,又检查了hosts文件也没有问题。</p>
<p>最后发现是squid.conf里的泛域名配置问题。</p>
<p>这批服务器在升级squid前,曾经在一台机器上测试新版本配置,之后一直没有更改,其中有如下字段:</p>
<div class="highlight"><pre><code class="language-squid" data-lang="squid"><span class="k">cache_peer</span><span class="w"> </span><span class="mf">1.2.3.4</span><span class="w"> </span><span class="no">parent</span><span class="w"> </span><span class="m">80</span><span class="w"> </span><span class="m">0</span><span class="w"> </span><span class="no">no-query</span><span class="w"> </span>no-netdb-exchange<span class="w"> </span>originserver<span class="w"></span>
cache_peer_domain<span class="w"> </span><span class="mf">1.2.3.4</span><span class="w"> </span>www.test.com<span class="w"></span></code></pre></div>
<p>所以在系统上怎么修改,都没法成功了。
由此可知,CDN加速对域名的解析,是squid配置文件最优先,然后才是系统的hosts文件,最后是DNS服务器。</p>
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