linux共享上网设置实例详解
<p><strong>linux共享上网设置</strong></p>
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<strong>1、打开内核ip转发</strong></p>
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<code class="bash functions">vi</code> <code class="bash plain">/etc/sysctl</code><code class="bash plain">.conf </code>
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<code class="bash plain">net.ipv4.ip_forward = 1</code>
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执行sysctrl -p生效 </p>
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<strong>2、如果主机未启用防火墙，那么如下设置iptables</strong></p>
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<code class="bash plain"></code><code class="bash comments"># iptables -F</code>
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<code class="bash plain"></code><code class="bash comments"># iptables -P INPUT ACCEPT</code>
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<code class="bash plain"></code><code class="bash comments"># iptables -P FORWARD ACCEPT </code>
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<code class="bash plain"></code><code class="bash comments"># iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE</code>
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<code class="bash plain">或者</code>
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<code class="bash spaces"> </code><code class="bash plain">iptables -t nat -A POSTROUTING -s ip -o eth0 -j MASQUERADE </code>
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<code class="bash spaces"> </code>
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<code class="bash plain">//</code><code class="bash plain">指定某ip或ip段可以转发</code>
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<code class="bash plain">iptables -t nat -A POSTROUTING -s 192.168.0.170 -o enp1s0 -j MASQUERADE</code>
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<code class="bash plain">iptables -t nat -A POSTROUTING -s 192.168.0.0</code><code class="bash plain">/24</code> <code class="bash plain">-o enp1s0 -j MASQUERADE</code>
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<code class="bash spaces"> </code>
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<code class="bash plain"></code><code class="bash comments"># /etc/init.d/iptables save</code>
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<code class="bash plain"></code><code class="bash comments"># /etc/init.d/iptables restart</code>
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<code class="bash plain">说明：</code>
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<code class="bash spaces"> </code><code class="bash plain">iptables -F </code><code class="bash comments">#清除原有的filter有中的规则 </code>
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<code class="bash spaces"> </code><code class="bash plain">iptables -t nat -F </code><code class="bash comments">#清除原有的nat表中的规则</code>
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<code class="bash spaces"> </code><code class="bash plain">iptables -P FORWARD ACCEPT </code><code class="bash comments">#缺省允许IP转发</code>
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如果主机上启用了防火墙，需加上下面两句： </p>
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<strong>Code: </strong></p>
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<code class="bash plain">iptables -A FORWARD -s 192.168.122.0</code><code class="bash plain">/24</code> <code class="bash plain">-o eth0 -j ACCEPT </code>
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<code class="bash plain">iptables -A FORWARD -d 192.168.122.0</code><code class="bash plain">/24</code> <code class="bash plain">-m state --state ESTABLISHED,RELATED -i eth0 -j ACCEPT</code>
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感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！</p>
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原文链接：http://www.cnblogs.com/zjd2626/p/6796220.html</p>
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