Linux nc命令
Linux nc命令用于设置路由器。
执行本指令可设置路由器的相关参数。
语法
|
1 |
<span class="pln">nc </span><span class="pun">[-</span><span class="pln">hlnruz</span><span class="pun">][-</span><span class="pln">g</span><span class="pun"><网关...>][-</span><span class="pln">G</span><span class="pun"><指向器数目>][-</span><span class="pln">i</span><span class="pun"><延迟秒数>][-</span><span class="pln">o</span><span class="pun"><输出文件>][-</span><span class="pln">p</span><span class="pun"><通信端口>][-</span><span class="pln">s</span><span class="pun"><来源位址>][-</span><span class="pln">v</span><span class="pun">...][-</span><span class="pln">w</span><span class="pun"><超时秒数>][主机名称][通信端口...]</span> |
参数说明：
- -g<网关> 设置路由器跃程通信网关，最多可设置8个。
- -G<指向器数目> 设置来源路由指向器，其数值为4的倍数。
- -h 在线帮助。
- -i<延迟秒数> 设置时间间隔，以便传送信息及扫描通信端口。
- -l 使用监听模式，管控传入的资料。
- -n 直接使用IP地址，而不通过域名服务器。
- -o<输出文件> 指定文件名称，把往来传输的数据以16进制字码倾倒成该文件保存。
- -p<通信端口> 设置本地主机使用的通信端口。
- -r 乱数指定本地与远端主机的通信端口。
- -s<来源位址> 设置本地主机送出数据包的IP地址。
- -u 使用UDP传输协议。
- -v 显示指令执行过程。
- -w<超时秒数> 设置等待连线的时间。
- -z 使用0输入/输出模式，只在扫描通信端口时使用。
实例
TCP端口扫描
|
1 2 3 4 5 |
<span class="com"># nc -v -z -w2 192.168.0.3 1-100 </span> <span class="lit">192.168</span><span class="pun">.</span><span class="lit">0.3</span><span class="pun">:</span><span class="pln"> inverse host lookup failed</span><span class="pun">:</span> <span class="typ">Unknown</span><span class="pln"> host </span><span class="pun">(</span><span class="pln">UNKNOWN</span><span class="pun">)</span> <span class="pun">[</span><span class="lit">192.168</span><span class="pun">.</span><span class="lit">0.3</span><span class="pun">]</span> <span class="lit">80</span> <span class="pun">(</span><span class="pln">http</span><span class="pun">)</span><span class="pln"> open </span><span class="pun">(</span><span class="pln">UNKNOWN</span><span class="pun">)</span> <span class="pun">[</span><span class="lit">192.168</span><span class="pun">.</span><span class="lit">0.3</span><span class="pun">]</span> <span class="lit">23</span> <span class="pun">(</span><span class="pln">telnet</span><span class="pun">)</span><span class="pln"> open </span><span class="pun">(</span><span class="pln">UNKNOWN</span><span class="pun">)</span> <span class="pun">[</span><span class="lit">192.168</span><span class="pun">.</span><span class="lit">0.3</span><span class="pun">]</span> <span class="lit">22</span> <span class="pun">(</span><span class="pln">ssh</span><span class="pun">)</span><span class="pln"> open</span> |
扫描192.168.0.3 的端口 范围是 1-100
扫描UDP端口
|
1 |
<span class="com"># nc -u -z -w2 192.168.0.1 1-1000 //扫描192.168.0.3 的端口 范围是 1-1000</span> |
扫描指定端口
|
1 2 3 |
<span class="com"># nc -nvv 192.168.0.1 80 //扫描 80端口</span> <span class="pun">(</span><span class="pln">UNKNOWN</span><span class="pun">)</span> <span class="pun">[</span><span class="lit">192.168</span><span class="pun">.</span><span class="lit">0.1</span><span class="pun">]</span> <span class="lit">80</span> <span class="pun">(?)</span><span class="pln"> open y </span><span class="com">//用户输入</span> |
© 版权声明
文章版权归作者所有，未经允许请勿转载。
