转至：https://blog.csdn.net/z1134145881/article/details/54706711
几种常用方法
下面一一介绍：
- 1 telnet方法
- 2 wget方法
- 3 ssh方法
- 4 curl方法
1 telnet
用法: telnet ip port
(1) telnet连接不存在的端口telnet 1.1.1.1 8 Trying 1.1.1.1... telnet: connect to address 1.1.1.1: Connection timed out
(2) telnet 链接存在端口telnet 1.1.1.1 8000 Trying 1.1.1.1... Connected to 1.1.1.1. Escape character is '^]'. Connection closed by foreign host.
2 wget
用法: wget ip:port
(1) 不存在端口wget 1.1.1.1:8 --2017-01-24 11:38:34-- http://1.1.1.1:8/ Connecting to 1.1.1.1:8... failed: Connection timed out. Retrying.
(2) 存在端口wget 1.1.1.1:8000 --2017-01-24 11:39:03-- http://1.1.1.1:8000/ Connecting to 1.1.1.1:8000... connected. HTTP request sent, awaiting response... 200 OK
3 ssh
用法: ssh -v -p port username@ip
-v 调试模式(会打印日志).
-p 指定端口
这里没有给出测试，留给读者自己测试4 curl
用法: curl ip:port
(1) 不存在端口
获取不到结果
(2) 存在端口curl 1.1.1.1:8000 <!DOCTYPE html> <html> <head>xxx</head> <body> ...... </body> </html>