👀 Views: 230 💬 Answers: 1 📅 Created: 2025-06-08

docker iptables ubuntu bash

I've searched everywhere and can't find a clear answer... I am having trouble configuring iptables on my Ubuntu 22.04 machine to manage traffic for Docker containers. I want to restrict access to a specific container based on IP ranges, but the rules I set up don't seem to be working as expected. I added the following rules: ```bash # Allow traffic to the container from a specific IP range iptables -A INPUT -p tcp -s 192.168.1.0/24 --dport 8080 -j ACCEPT # Drop traffic from other sources iptables -A INPUT -p tcp --dport 8080 -j DROP ``` After applying these rules, I checked the settings with `iptables -L` and confirmed that the rules were correctly listed. However, when I try to access the container exposed on port 8080 from a different subnet (like 192.168.2.x), I still get a connection timeout. I have also tried flushing the iptables before applying new rules to ensure there are no conflicting settings: ```bash iptables -F ``` Additionally, I verified the Docker network configurations and ensured that the container is indeed reachable from the host. The container is running with the following command: ```bash docker run -d -p 8080:80 --name my_container my_image ``` I am using Docker's default bridge networking. What am I missing here? Could there be any Docker-specific settings that are overriding my iptables rules? Any help or insight would be greatly appreciated! For context: I'm using Bash on Windows. I'm working on a application that needs to handle this. How would you solve this?