Mac测试远程端口是否正常命令

命令：nc -vz -w2 ip port

 

 

nc：netcat

命令格式

`nc -hlnruz-G<指向器数目>-o<输出文件>

-s<来源位址>-w<超时秒数>通信端口...`

命令选项

• -g<网关> 设置路由器跃程通信网关，最多可设置8个。
• -G<指向器数目> 设置来源路由指向器，其数值为4的倍数。
• -h 在线帮助。
• -i<延迟秒数> 设置时间间隔，以便传送信息及扫描通信端口。
• -l 使用监听模式，管控传入的资料。
• -n 直接使用IP地址，而不通过域名服务器。
• -o<输出文件> 指定文件名称，把往来传输的数据以16进制字码倾倒成该文件保存。
• -p<通信端口> 设置本地主机使用的通信端口。
• -r 乱数指定本地与远端主机的通信端口。
• -s<来源位址> 设置本地主机送出数据包的IP地址。
• -u 使用UDP传输协议。
• -v 显示指令执行过程。
• -w<超时秒数> 设置等待连线的时间。
• -z 使用0输入/输出模式，只在扫描通信端口时使用。
   
  

   

  转自：https://cloud.tencent.com/developer/article/1964152 

  > nc -v -z -w2 rumenz.com 20-30 nc: connectx to rumenz.com port 20 (tcp) failed: Connection refused nc: connectx to rumenz.com port 21 (tcp) failed: Connection refused found 0 associations found 1 connections: 1: flags=82<CONNECTED,PREFERRED> outif en0 src 192.168.0.105 port 57984 dst 203.195.152.245 port 22 rank info not available TCP aux info available Connection to rumenz.com port 22 [tcp/ssh] succeeded! nc: connectx to rumenz.com port 23 (tcp) failed: Connection refused nc: connectx to rumenz.com port 24 (tcp) failed: Connection refused nc: connectx to rumenz.com port 25 (tcp) failed: Connection refused nc: connectx to rumenz.com port 26 (tcp) failed: Connection refused nc: connectx to rumenz.com port 27 (tcp) failed: Connection refused nc: connectx to rumenz.com port 28 (tcp) failed: Connection refused nc: connectx to rumenz.com port 29 (tcp) failed: Connection refused nc: connectx to rumenz.com port 30 (tcp) failed: Connection refused

> nc -v -z -w2 rumenz.com 20-30 nc: connectx to rumenz.com port 20 (tcp) failed: Connection refused nc: connectx to rumenz.com port 21 (tcp) failed: Connection refused found 0 associations found 1 connections: 1: flags=82<CONNECTED,PREFERRED> outif en0 src 192.168.0.105 port 57984 dst 203.195.152.245 port 22 rank info not available TCP aux info available Connection to rumenz.com port 22 [tcp/ssh] succeeded! nc: connectx to rumenz.com port 23 (tcp) failed: Connection refused nc: connectx to rumenz.com port 24 (tcp) failed: Connection refused nc: connectx to rumenz.com port 25 (tcp) failed: Connection refused nc: connectx to rumenz.com port 26 (tcp) failed: Connection refused nc: connectx to rumenz.com port 27 (tcp) failed: Connection refused nc: connectx to rumenz.com port 28 (tcp) failed: Connection refused nc: connectx to rumenz.com port 29 (tcp) failed: Connection refused nc: connectx to rumenz.com port 30 (tcp) failed: Connection refused