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nc基础用法1

2022-04-23 19:47:00 【franket】

端口扫描

[[email protected] ~]# nc -zvn 192.168.100.101  20-25
nc: connect to 192.168.100.101 port 20 (tcp) failed: No route to host
nc: connect to 192.168.100.101 port 21 (tcp) failed: No route to host
Connection to 192.168.100.101 22 port [tcp/*] succeeded!
nc: connect to 192.168.100.101 port 23 (tcp) failed: No route to host
nc: connect to 192.168.100.101 port 24 (tcp) failed: No route to host
nc: connect to 192.168.100.101 port 25 (tcp) failed: No route to host
[[email protected] ~]# nc -zvn 192.168.100.101  3306
Connection to 192.168.100.101 3306 port [tcp/*] succeeded!
[[email protected] ~]#

Option	Comment
-z	只作扫描，不发数据
-n	不作解析，数字状态
-v	给出详细信息

打开一个会话连接

[[email protected] ~]# nc -l 12345
hello
for test
i miss you
^_^
----------
[[email protected] BGPtest]# nc h102 12345
hello  
for test
i miss you
^_^

此刻，要确认server端的防火墙对于12345端口是打开的

文件传输

server端发文件

[[email protected] nc]# echo "abc test" > file.txt
[[email protected] nc]# nc -l 2345 < file.txt 
----------
[[email protected] nc]# nc h102 2345 > f.txt
[[email protected] nc]# cat f.txt 
abc test
[[email protected] nc]#

server端收文件

[[email protected] nc]# nc -l 2345 > file.txt 
----------
[[email protected] nc]# echo "uiuiuiuiui" > f.txt 
[[email protected] nc]# nc -v h102 2345 < f.txt
Connection to h102 2345 port [tcp/dbm] succeeded!
[[email protected] nc]# 
----------
[[email protected] nc]# cat file.txt 
uiuiuiuiui
[[email protected] nc]#

版权声明
本文为[franket]所创，转载请带上原文链接，感谢
https://cloud.tencent.com/developer/article/1986159