How can you check open ports in CentOS?

There are several methods to view open ports on CentOS.

1. Use the netstat command:

netstat -tuln

This command will list all the ports that are currently being monitored, along with their status and PID.

1. Utilize the ss command:

ss -tuln

The ss command can also be used to list the ports that are currently being listened to, and it is faster and more reliable than the netstat command.

1. Utilize the firewall-cmd command:

firewall-cmd --list-ports

This command will show the open ports in the firewall.

1. Use the nmap command:

nmap -sT -O localhost

This command will scan the local computer and list open ports. However, it requires the nmap tool to be installed beforehand.

By using the above methods, you can view the open ports and related information on CentOS.

More tutorials

How to check for listening ports in Linux?(Opens in a new browser tab)

How to check the listening status of ports in CentOS 7?(Opens in a new browser tab)

How to add a port to the CentOS firewall?(Opens in a new browser tab)

How can Linux detect if a remote host’s port is open?(Opens in a new browser tab)

How can I change the firewall port in CentOS 7?(Opens in a new browser tab)