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如何测试端口通不通(四种方法)

比较乱 自便观看

针对Linux系统:有1、2、3、4四种方法
针对Windows系统:有2、5两种通用方法
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

启动一个web服务器,提供端口.

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[[email protected] ~]$ 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

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[[email protected] ~]# 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

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[[email protected] ~]# 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 [email protected]

-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

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[[email protected] ~]# ssh 10.0.250.3 -p 80
ssh: connect to host 10.0.250.3 port 80: Connection refused
[[email protected] ~]# 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

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[[email protected] ~]# ssh … -p
a
^]
^C
[[email protected] ~]# 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 .
debug: Connection established.
debug: permanently_set_uid: /
debug: identity file /root/.ssh/identity type –
debug: identity file /root/.ssh/identity-cert type –
debug: identity file /root/.ssh/id_rsa type –
debug: identity file /root/.ssh/id_rsa-cert type –
debug: identity file /root/.ssh/id_dsa type –
debug: identity file /root/.ssh/id_dsa-cert type –
a
^C
不用-v选项也可以咯

3、使用wget判断

wget是linux下的下载工具,需要先安装.

用法: wget ip:port

1)连接不存在的端口

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[[email protected] ~]# wget …:
—- ::– http://…/
Connecting to …:… failed: Connection refused.
2)连接存在的端口

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[[email protected] ~]# wget …:
—- ::– http://…:/
Connecting to …:… connected.
HTTP request sent, awaiting response…
4、使用端口扫描工具

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[[email protected] ~]# nmap … -p
Starting Nmap . ( http://nmap.org ) at — : CST
Nmap scan report for …
Host is up (.s latency).
PORT STATE SERVICE
/tcp closed http
MAC Address: B:A::CF:FD:D (Unknown)
Nmap done: IP address ( host up) scanned in . seconds
[[email protected] ~]# nmap … -p
Starting Nmap . ( http://nmap.org ) at — : CST
Nmap scan report for …
Host is up (.s latency).
PORT STATE SERVICE
/tcp open http-proxy
MAC Address: B:A::CF:FD:D (Unknown)
Nmap done: IP address ( host up) scanned in . seconds
[[email protected] ~]# nmap …
Starting Nmap . ( http://nmap.org ) at — : CST
Nmap scan report for …
Host is up (.s latency).
Not shown: closed ports
PORT STATE SERVICE
/tcp open ssh
/tcp open rpcbind
/tcp open http-proxy
/tcp open unknown
MAC Address: B:A::CF:FD:D (Unknown)
Nmap done: IP address ( host up) scanned in . seconds
5、使用专用工具tcping进行访问:

下载软件地址:https://elifulkerson.com/projects/tcping.php,如果无法下载可以从本人资源中下载

总结

提供端口服务,则使用了tcp协议,上面是以web服务器为例。如果服务器是更简单的tcp服务器,三个工具同样适用.

三个工具的共同点是:1.以tcp协议为基础;2.能访问指定端口. 遵循这两点可以找到很多工具.

一般在windows下使用tcping比较方便,linux下个人就比较喜欢用wget.
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版权声明:本文为CSDN博主「zafer」的原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/swazer_z/article/details/64442730

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