Super simple firewall configuration for debian/Ubuntu system
Windows has been running naked for years
But Linux systems are more complex, especially servers that are exposed to the public network, so a simple configuration of the firewall is necessary
The firewall described here is ufw and is theoretically applicable to all debian/Ubuntu distribution based systems
ufw setingufw seting
Install firewall management software ufw
Apt to get the install ufw
Here's a simple ufw firewall configuration command