How do I set up a firewall using iptables?
An example of an AI chatbot conversation about setting up a firewall with iptables.
How do I set up a firewall using iptables?
To set up a firewall using iptables, you need to define rules that control incoming and outgoing traffic. Would you like a basic example?
Yes, please provide a basic example.
A simple rule to allow SSH traffic would be: iptables -A INPUT -p tcp --dport 22 -j ACCEPT. This allows incoming connections on port 22.
What if I want to block all other incoming traffic?
You can add a rule to drop all other incoming traffic with: iptables -A INPUT -j DROP. Make sure to place this rule at the end of your rules list.
How do I save these iptables rules?
You can save the rules using iptables-save > /etc/iptables/rules.v4 on Debian-based systems. This will ensure they persist after a reboot.
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