如何测试端口通不通如何测试端口通不通(四种方法)四种方法)
一般情况下使用”telnet ip port”判断端口通不通,其实测试方法不止这一种,还有很多种方法,下面小编给大家分享了几种方
法,具体内容请往下看:
准备环境准备环境
启动一个web服务器,提供端口.
[wyq@localhost ~]$ python -m SimpleHTTPServer 8080
Serving HTTP on 0.0.0.0 port 8080 ...
用其它web服务器提供端口也一样,由于python比较方便,这里就用它
1、使用telnet判断
telnet是windows标准服务,可以直接用;如果是linux机器,需要安装telnet.
用法: telnet ip port
1)先用telnet连接不存在的端口
[root@localhost ~]# telnet 10.0.250.3 80
Trying 10.0.250.3...
telnet: connect to address 10.0.250.3: Connection refused #直接提示连接被拒绝
2)再连接存在的端口
[root@localhost ~]# telnet localhost 22
Trying ::1...
Connected to localhost. #看到Connected就连接成功了
Escape character is '^]'.
SSH-2.0-OpenSSH_5.3
a
Protocol mismatch.
Connection closed by foreign host.
2、使用ssh判断
ssh是linux的标准配置并且最常用,可以用来判断端口吗?
用法: ssh -v -p port username@ip
-v 调试模式(会打印日志).
-p 指定端口
username可以随意
1)连接不存在端口
[root@localhost ~]# ssh 10.0.250.3 -p 80
ssh: connect to host 10.0.250.3 port 80: Connection refused
[root@localhost ~]# ssh 10.0.250.3 -p 80 -v
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 10.0.250.3 [10.0.250.3] port 80.
debug1: connect to address 10.0.250.3 port 80: Connection refused
ssh: connect to host 10.0.250.3 port 80: Connection refused
2)连接存在的端口
[root@localhost ~]# ssh ... -p
a
^] ^C
[root@localhost ~]# ssh ... -p -v
OpenSSH_.p, OpenSSL ..e-fips Feb
debug: Reading configuration data /etc/ssh/ssh_config
debug: Applying options for *
debug: Connecting to ... [...] port .
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