測試遠端埠是否開啟
阿新 • • 發佈:2018-11-11
文章概述:怎樣測試遠端UDP埠,我們一般情況下,應用服務都使用的TCP埠,但是某些情況下,我們需要開啟UDP埠。本文簡要描述怎樣測試UDP埠是否正常?
1、用telnet 測試TCP埠是否開啟
[[email protected] ~]# telnet 192.168.0.1 80
Trying 192.168.0.1...
Connected to 192.168.0.1.
Escape character is '^]'.
這個是通的,表示該埠為開啟狀態。
2.我們使用nc來進行UDP埠測試,如下
[[email protected] ~]# nc -vuz 192.168.0.1 139
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connected to 192.168.0.1:139.
Ncat: Connection refused.
[ [email protected] ~]# nc -vuz 192.168.0.1 69
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connected to 192.168.0.1:69.
Ncat: UDP packet sent successfully
Ncat: 1 bytes sent, 0 bytes received in 2.03 seconds.
很明顯,139埠是沒有開放的,但是69埠是開放的。