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Learn how to seamlessly redirect your naked domain (example.com) to the www version (www.example.com) using Traefik. Follow this comprehensive guide to resolve your redirection issues!
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A Comprehensive Guide to Redirecting Naked Domains to www with Traefik

If you're managing a website and want to ensure that visitors are always directed to the www version of your domain (e.g., example.com to www.example.com), you might face some technical challenges. This commonly faced issue often leaves webmasters puzzled, especially when using reverse proxies like Traefik. In this guide, we will delve into the process of setting up a redirection for a naked domain to its www counterpart using Traefik.

The Problem

The core of the problem involves a simple misconfiguration that can lead you down a frustrating path. An attempt was made to redirect example.com to www.example.com using a middleware in Traefik's configuration. However, the expected behavior was not achieved; instead of redirecting to https://www.example.com, the setup mistakenly redirected to https://www.www.example.com, resulting in a 404 error.

Understanding the Solution

To rectify this issue, we need to properly configure the traefik routers and ensure that two distinct routers are defined—one for handling the naked domain and another for the www subdomain. Let’s break this down step-by-step.

Step 1: Define Middleware

First, ensure that your redirection middleware is properly defined in your docker-compose.yml:

[[See Video to Reveal this Text or Code Snippet]]

This label ensures that any request to example.com gets redirected to the www version, preserving other parts of the URL.

Step 2: Configure Routers

Now, you need to set up two distinct routers for handling requests accordingly. Your service configuration in docker-compose.yml should look like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Explanation of Configuration

Router for Naked Domain (whoami-naked):

Entrypoints: Specifies which entry point Traefik will use (in this case, websecure for HTTPS).

Rule: Matches requests that come in for the naked domain (example.com).

Middlewares: Applies the previously defined redirection middleware.

Router for WWW Domain (whoami-www):

Entrypoints: Again set to websecure to ensure it handles secure traffic.

Rule: Matches requests for the www domain (www.example.com). This router acts as the destination for successfully redirected traffic.

Conclusion

By clearly defining these two routers and utilizing the middleware for redirection, you can effectively redirect users from the naked domain to the www version without running into any unexpected behaviors such as redirect loops or unintended 404 errors.

With this setup in place, visiting either https://example.com or https://www.example.com will now correctly lead users to the right destination—https://www.example.com.

If you're still having issues or have additional questions about Traefik configurations, feel free to reach out for more detailed help! Happy redirecting!