Setting Up a Basic Firewall

Learn how to set up a basic firewall to protect your network from unauthorized access and attacks.

Setting Up a Basic Firewall  

Basic Firewall Configuration  

Using iptables  

Set up a firewall using iptables to control incoming and outgoing traffic. Iptables is a powerful tool for managing network traffic rules.

# Example: Basic iptables rules
sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT
sudo iptables -A INPUT -j DROP

Persistent Rules  

Ensure iptables rules persist across reboots by saving them to a file and restoring them at boot.

# Example: Saving iptables rules
sudo iptables-save > /etc/iptables/rules.v4