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 seting ufw seting
Install firewall management software ufw
Apt to get the install ufw
Here’s a simple ufw firewall configuration command
apt-get install ufw
#install ufw for ubuntn/debian
ufw allow ssh
#allow ssh port 22
ufw allow 80
ufw allow 192.168.0.8
ufw allow 192.168.0.8/tcp
#ufw enable
setup ufw boot
ufw status
#ufw run check
ufw delete allow 80
#disable 80
ufw reload
#ufw rules reload