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	<title>服务器安全维护工作室 &#187; dropping packet</title>
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		<title>解决Centos5/6 ip_conntrack: table full, dropping packet</title>
		<link>https://www.fuwuqiok.com/%e8%a7%a3%e5%86%b3centos56-ip_conntrack-table-full-dropping-packet/</link>
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		<pubDate>Sat, 15 Aug 2015 04:35:12 +0000</pubDate>
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		<category><![CDATA[解决Centos5/6 ip_conntrack: table full]]></category>
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		<description><![CDATA[<p>linux中会有一个模块用于跟踪IP的连接情况 ip_conntrack，但是这个表的容量是有限制的，一般情况 [&#8230;]</p>
<p><a rel="nofollow" href="https://www.fuwuqiok.com/%e8%a7%a3%e5%86%b3centos56-ip_conntrack-table-full-dropping-packet/">解决Centos5/6 ip_conntrack: table full, dropping packet</a>，首发于<a rel="nofollow" href="https://www.fuwuqiok.com">服务器安全维护工作室</a>。</p>
]]></description>
				<content:encoded><![CDATA[<div>linux中会有一个模块用于跟踪IP的连接情况 ip_conntrack，但是这个表的容量是有限制的，一般情况下和内存有关。</div>
<div>当链接过多的时候系统就会报错ip_conntrack: table full, dropping packet，可以修改/proc/sys/net/ipv4/netfilter/ip_conntrack_max；</div>
<div>有时候会发现/proc下没有这个目录，这时候是由于这个模块挂载有问题，而RH5和RH6下模块名也不一样<span id="more-379"></span></div>
<div>可修改/etc/sysctl.conf 然后sysctl -p生效。</div>
<div></div>
<div><strong>RH6系列</strong></div>
<div>modprobe nf_conntrack</div>
<div>net.nf_conntrack_max = 655360</div>
<div>
<div>net.netfilter.nf_conntrack_tcp_timeout_established = 36000</div>
<div></div>
<div><strong>RH5系列</strong></div>
<div>modprobe  ip_conntrack</div>
<div></div>
<div>net.ipv4.ip_conntrack_max = 655350</div>
<div>在内核内存中netfilter可以同时处理的“任务”（连接跟踪条目）<br />
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 10800<br />
跟踪的连接超时结束时间</div>
</div>
<p><a rel="nofollow" href="https://www.fuwuqiok.com/%e8%a7%a3%e5%86%b3centos56-ip_conntrack-table-full-dropping-packet/">解决Centos5/6 ip_conntrack: table full, dropping packet</a>，首发于<a rel="nofollow" href="https://www.fuwuqiok.com">服务器安全维护工作室</a>。</p>
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