How to Check Opened Port on Linux VPS Server

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By default, the linux operating system manages 65536 ports. If you run Virtual private Server (VPS) on linux platform, it is better to turn off any services or ports that you don’t actually need. This is to ensure your VPS server will not become avenues of attack for any security threats. Simply run these commands to easily see open ports on your Linux VPS server that are currently listening.

1. List opened ports with protocol name :

[[email protected] ~]# netstat --listen --tcp

Examples :

[[email protected] ~]# netstat --listen --tcp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State
tcp        0      0 *:mysql                     *:*                         LISTEN
tcp        0      0 *:http                      *:*                         LISTEN
tcp        0      0 *:ftp                       *:*                         LISTEN
tcp        0      0 *:ssh                       *:*                         LISTEN

2. List opened ports with protocol number :

[[email protected] ~]# netstat --listen --tcp -n

Examples :

[[email protected] ~]# netstat --listen --tcp -n
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN
tcp        0      0 0.0.0.0:21                  0.0.0.0:*                   LISTEN
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN

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