[zeuux-www] [zeuux-cvs] cvs commit: www/zeuux.org/science learning-tcpdump.cn.html
Bill Xu
bill at zeuux.org
Tue Jul 8 18:42:54 CST 2008
很好,尽量多加一些案例,请夏武给一些具体的意见。
王喜同志,我们正在创作一些列的自由软件文档,其中的一个是tcpdump,可否给
一些专业建议?
> <p>实例:<br>
> #tcpdump -i eth0 -X src host 10.1.2.1</p>
>
> + <h3>实践经验</h3>
> + <h4>诊断arp风暴</h4>
> + <p>arp攻击包括arp扫描和arp欺骗两类。arp风暴属于前者,它是指由于病毒作用,导致主机向整个网络内广播大量arp请求,耗尽带宽资源,使网络瘫痪的现象,它往往是arp欺骗的前兆,用于破坏网络连接、盗取他人网络账号。<br>
> + tcpdump -e arp 可以用来监听网络内部广播的所有数据包,监听结果中包含数据发送方Mac地址、arp请求方法IP地址等其他信息,如果某个或多个固定MAC地址的主机连续发送大量请求广播,并得到回应,则其有可能为arp风暴源。可以对此主机进行物理隔离,进行再判断。</p>
> + <div class="code_outline">
> + <pre class="display_code">
> +kongove at ubuntu:~$ sudo tcpdump -e arp
> +09:43:48.630521 00:15:c5:6d:0e:80 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: arp who-has 192.168.2.1 tell 192.168.8.237
> +09:43:48.734420 00:e0:4d:1a:c9:24 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: arp who-has 192.168.44.138 tell 192.168.44.156
> +09:43:48.842663 00:e0:e4:02:32:59 (oui Unknown) > Broadcast, ethertype ARP (0x0806), length 60: arp who-has 192.168.21.1 tell 192.168.21.251
> +</pre></div>
> +
> <h3>总结</h3>
> <h3>参考资料</h3>
> <ul>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> zeuux-cvs mailing list
> zeuux-cvs at zeuux.org
> http://www.zeuux.org/mailman/listinfo/zeuux-cvs
>
> ZEUUX Project - Free Software, Free Society!
> http://www.zeuux.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.zeuux.org/pipermail/zeuux-www/attachments/20080708/e8819992/attachment.html>
More information about the zeuux-www
mailing list