标签：ane serve 常用 reading nta 下载 .net fun waiting
经常会遇到测试服务器端口通不通的情况,在window上常用的是Telnet,不过Linux下Telnet是需要安装的.
一般情况下使用"telnet ip port"判断端口通不通，其实不止这一种，还有很多种方法：
准备环境
启动一个web服务器，提供端口.
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[wyq@localhost ~]$ python -m SimpleHTTPServer 8080Serving 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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[root@localhost ~]# telnet 10.0.250.3 80Trying 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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[root@localhost ~]# telnet localhost 22Trying ::1...Connected to localhost. #看到Connected就连接成功了Escape character is ‘^]‘.SSH-2.0-OpenSSH_5.3aProtocol 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
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[root@localhost ~]# ssh 10.0.250.3 -p 80ssh: connect to host 10.0.250.3 port 80: Connection refused[root@localhost ~]# ssh 10.0.250.3 -p 80 -vOpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013debug1: Reading configuration data /etc/ssh/ssh_configdebug1: 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 refusedssh: connect to host 10.0.250.3 port 80: Connection refused |
2）连接存在的端口
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[root@localhost ~]# ssh ... -p a^]^C[root@localhost ~]# ssh ... -p -vOpenSSH_.p, OpenSSL ..e-fips Feb debug: Reading configuration data /etc/ssh/ssh_configdebug: 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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[root@localhost ~]# wget ...:---- ::-- http://.../Connecting to ...:... failed: Connection refused. |
2）连接存在的端口
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[root@localhost ~]# wget ...:---- ::-- http://...:/Connecting to ...:... connected.HTTP request sent, awaiting response... |
4、使用端口扫描工具
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[root@localhost ~]# nmap ... -p Starting Nmap . ( http://nmap.org ) at -- : CSTNmap scan report for ...Host is up (.s latency).PORT STATE SERVICE/tcp closed httpMAC Address: B:A::CF:FD:D (Unknown)Nmap done: IP address ( host up) scanned in . seconds[root@localhost ~]# nmap ... -p Starting Nmap . ( http://nmap.org ) at -- : CSTNmap scan report for ...Host is up (.s latency).PORT STATE SERVICE/tcp open http-proxyMAC Address: B:A::CF:FD:D (Unknown)Nmap done: IP address ( host up) scanned in . seconds[root@localhost ~]# nmap ...Starting Nmap . ( http://nmap.org ) at -- : CSTNmap scan report for ...Host is up (.s latency).Not shown: closed portsPORT STATE SERVICE/tcp open ssh/tcp open rpcbind/tcp open http-proxy/tcp open unknownMAC Address: B:A::CF:FD:D (Unknown)Nmap done: IP address ( host up) scanned in . seconds |
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telnet比较方便，linux 下wget ssh 比较方便些.
转自 https://www.jb51.net/article/78082.htm
标签：ane serve 常用 reading nta 下载 .net fun waiting
原文地址：https://www.cnblogs.com/xd502djj/p/9395124.html
