TOC
Telnet
telnet host post
示例:
[yaohong@host ~]# telnet www.baidu.com 80
Trying 14.215.177.38...
Connected to www.baidu.com.
Escape character is '^]'.
出现Connected to
表示连接上主机;
[yaohong@host ~]# telnet www.baidu.com 882
Trying 14.215.177.38...
telnet: connect to address 14.215.177.38: Connection timed out
Trying 14.215.177.39...
没有出现Connected to
表示未连接成功。
nc
nc也可用来测试主机+端口的连接;
如:
[yaohong@host ~]# nc www.baidu.com 80
HTTP/1.1 400 Bad Request
Ncat: Broken pipe.
这里HTTP/1.1 400 Bad Request
是baidu服务器的返回;
当主机连接不上提示timed out
,如:
[yaohong@host ~]# nc www.baidu.com 81
Ncat: Connection timed out.
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