How do I set up GitHub Pages to redirect DNS requests from a subdomain ( e . G . Www) to the top-level domain ( TLD , Apex record)?
1. Setting up the GitHub Pages RepositoryFirst, ensure you have a GitHub repository for hosting your website files. In the repository settings, locate the 'Pages' section and select a branch as your deployment source.2. Configuring the Top-Level DomainIn the repository's Pages settings, add a custom domain. Here, enter your top-level domain, such as .3. Updating DNS RecordsNext, log in to your domain registrar's management interface to configure DNS settings.Adding A Records for the Top-Level DomainGitHub provides specific IP addresses for A records, which must be added to the DNS settings for the top-level domain. For example:Adding CNAME Records for the www SubdomainFor subdomains like , add a CNAME record pointing to .4. Redirect SettingsWhile DNS records handle resolution from www to the top-level domain, HTTP-level redirects may be necessary to ensure users accessing are redirected to . GitHub Pages automatically manages www-to-non-www redirects for the top-level domain, so once DNS is correctly configured, this step typically requires no additional user action.5. Testing the ConfigurationFinally, verify both and are accessible, with the www version correctly redirecting to the top-level domain. Use tools like to test HTTP headers:This should display a 301 redirect to .ExampleSuppose I have a project with the domain . I followed the above steps to set up GitHub Pages and DNS. Initially, I configured only the top-level domain in GitHub Pages and added A records for it in the DNS provider. Later, I discovered that accessing did not redirect to , so I added a CNAME record for pointing to . After a few hours, DNS propagated, and everything worked smoothly, with successfully redirecting to .This method ensures that regardless of how users input the domain, it is unified to a single address, thereby avoiding content duplication and fragmented SEO weight issues.