How to open my server ports?

All ports are allowed to be used and none are blocked by default. To see the port as “Open”, two main points are important: First, you need to allow it via firewall on the server, and second, launch the service which would listen to the specific port.

If communication is not possible over a specific port, please check the firewall rules in your server.
You might need to open a port in your firewall settings first.
For example:

  • In your Windows server – check your Windows Firewall.
  • In your Linux server – check your iptables, firewalld or csf firewall, depending on the firewall you are using.

To find the process or service listening on a particular port in Linux, netstat command can be used with grep command as follows (i.e. port 80):

netstat -tulpn | grep 80

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