How do I set up a firewall for my Docker containers?

How do I set up a firewall for my Docker containers?

To set up a firewall for your Docker containers, you can use iptables or firewalld. Which one would you prefer?

I think I'll go with iptables. Can you guide me through the steps?

Sure! First, you need to ensure that iptables is installed. Then, you can start by allowing traffic on specific ports. What ports do your containers use?

My containers use ports 80 and 443.

Great! You can run the following commands: iptables -A INPUT -p tcp --dport 80 -j ACCEPT and iptables -A INPUT -p tcp --dport 443 -j ACCEPT. This will allow traffic on those ports.

What about blocking all other traffic?

To block all other traffic, you can add iptables -A INPUT -j DROP at the end of your rules. Just make sure to place it after your allow rules.