👀 Views: 92 💬 Answers: 1 📅 Created: 2025-06-09

docker ubuntu networking containers bash

I'm reviewing some code and Hey everyone, I'm running into an issue that's driving me crazy. I'm running Ubuntu 22.04 and I've set up a Docker container to run a web application. However, I'm working with an scenario where the container want to access the host's network interfaces. The application needs to communicate with a service running on the host, but it fails with a connection timeout. I've confirmed that the service is running on the host and is listening on the correct port (8080). I tried to use the `--network host` option while running the container, but that didn't seem to resolve the scenario. Here’s the command I used to run the container: ```bash docker run --rm -it --network host my-web-app ``` Within the container, I tried to ping the host, but it fails with: ```bash ping: unknown host my-host ``` Additionally, if I run a network diagnostics tool like `curl` or `telnet` to the host's IP and port, I get a connection refused behavior: ```bash curl http://my-host:8080 ``` I also checked the firewall rules using `ufw status`, and it shows that port 8080 is allowed. To troubleshoot further, I attempted to connect to 127.0.0.1 from inside the container, but I still encounter timeouts. Is there a specific configuration I need to adjust in Docker or on the host to allow access to host network interfaces, or am I missing something in my setup? For context: I'm using Bash on Windows. What's the best practice here? This is happening in both development and production on Debian.