In simple words:

By default, all ports are already opened. However, in order to ping, you need a relevant service to listen to the port.
For example, if you want the port 80 to be available to ping, you need to start a web service.

python -m SimpleHTTPServer 80

With a more professional description:

You can't ping ports, as Ping is using ICMP which is an internet layer protocol that doesn't have ports. Ports belong to the transport layer protocols like TCP and UDP.
However, you could use nmap to see whether ports are open or not

nmap -p 80 example.com
Cette réponse était-elle pertinente? 3 Utilisateurs l'ont trouvée utile (8 Votes)

Les plus consultés

Firewall

Firewall Owing to the 'Firewall' page, your clients can set up firewall rules and enable a...
IP is not accessible from China

Q: Why can't I connect to my IP from China any more? A: Your service's IP may have been banned...
Resolving CentOS 7 YUM Update Issues: Using Vault Repository Instead of Mirrorlist

1. Run the commands: sudo sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*sudo sed...