Centos查看端口占用情况和开启端口命令详解
<p>Centos查看端口占用情况命令，比如查看80端口占用情况使用如下命令： </p>
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<code class="bash functions">lsof</code> <code class="bash plain">-i tcp:80</code>
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列出所有端口</p>
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<code class="bash functions">netstat</code> <code class="bash plain">-ntlp</code>
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<span><strong> 1、开启端口（以80端口为例）</strong></span></p>
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<strong>方法一：</strong></p>
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<code class="bash plain">/sbin/iptables</code> <code class="bash plain">-I INPUT -p tcp --dport 80 -j ACCEPT 写入修改</code>
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<code class="bash plain">/etc/init</code><code class="bash plain">.d</code><code class="bash plain">/iptables</code> <code class="bash plain">save 保存修改</code>
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<code class="bash plain">service iptables restart 重启防火墙，修改生效</code>
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<strong>方法二：</strong></p>
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vi /etc/sysconfig/iptables 打开配置文件加入如下语句:</p>
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<code class="bash plain"><div class=</code><code class="bash string">"codetitle"</code><code class="bash plain">><span><a data=</code><code class="bash string">"315"</code> <code class="bash plain">class=</code><code class="bash string">"copybut"</code> <code class="bash functions">id</code><code class="bash plain">=</code><code class="bash string">"copybut315"</code><code class="bash plain">><u>复制代码<</code><code class="bash plain">/u</code><code class="bash plain">><</code><code class="bash plain">/a</code><code class="bash plain">><</code><code class="bash plain">/span</code><code class="bash plain">> 代码如下:<</code><code class="bash plain">/div</code><code class="bash plain">><div class=</code><code class="bash string">"codebody"</code> <code class="bash functions">id</code><code class="bash plain">=</code><code class="bash string">"code315"</code><code class="bash plain">> -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT 重启防火墙，修改完成</code>
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<code class="bash plain"><</code><code class="bash plain">/div</code><code class="bash plain">></code>
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<span><strong>2、关闭端口</strong></span></p>
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<strong> 方法一：</strong></p>
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<code class="bash plain">/sbin/iptables</code> <code class="bash plain">-I INPUT -p tcp --dport 80 -j DROP 写入修改</code>
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<code class="bash plain">/etc/init</code><code class="bash plain">.d</code><code class="bash plain">/iptables</code> <code class="bash plain">save 保存修改</code>
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<code class="bash plain">service iptables restart 重启防火墙，修改生效</code>
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<strong>方法二</strong>：</p>
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vi /etc/sysconfig/iptables 打开配置文件加入如下语句:</p>
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<code class="bash plain"><div class=</code><code class="bash string">"codetitle"</code><code class="bash plain">><span><a data=</code><code class="bash string">"92029"</code> <code class="bash plain">class=</code><code class="bash string">"copybut"</code> <code class="bash functions">id</code><code class="bash plain">=</code><code class="bash string">"copybut92029"</code><code class="bash plain">><u>复制代码<</code><code class="bash plain">/u</code><code class="bash plain">><</code><code class="bash plain">/a</code><code class="bash plain">><</code><code class="bash plain">/span</code><code class="bash plain">> 代码如下:<</code><code class="bash plain">/div</code><code class="bash plain">><div class=</code><code class="bash string">"codebody"</code> <code class="bash functions">id</code><code class="bash plain">=</code><code class="bash string">"code92029"</code><code class="bash plain">>-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j DROP 重启防火墙，修改完成</code>
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<code class="bash plain"><</code><code class="bash plain">/div</code><code class="bash plain">></code>
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<span><strong>3、查看端口状态</strong></span></p>
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<code class="bash plain">/etc/init</code><code class="bash plain">.d</code><code class="bash plain">/iptables</code> <code class="bash plain">status</code>
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。</p>
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原文链接：http://www.centoscn.com/CentOS/help/2013/0725/558.html</p>
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