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)?

Short answer Step 1: Add a new file CNAME to your GitHub Pages repository containing only one line: your top-level domain name. E.g.: example.com Step 2: [Optional] but highly recommended 2.1: Remove all other top-level records (prefixed with @) of type A from your DNS configuration. 2.2: Remove a CNAME record for the second-level domain … Read more

Firefox invalidate dns cache [closed]

DNS caching occurs at multiple levels: Application asks local system, which asks locally configured resolving DNS server, which asks authoritative DNS servers. Caching by Application varies. I’ve found for Firefox that quitting and restarting works. The relevant settings in about:config are network.dnsCacheEntries and network.dnsCacheExpiration, which can be set to 0 in order to disable caching. … Read more

Domain IP address for www and non-www for Canonical URL

The mechanisms you describe (A and CNAME records vs. 301 redirects) are part of two different protocols (DNS and HTTP). A and CNAME records have nothing to do with which site your HTTP server serves for different requests. Let’s look at two different DNS configurations: Configuration 1 (CNAME record) Host | Type | Data —————–+——-+————- … Read more

How to force DNS refresh for a website?

As far as I know, a forced update like this is not directly possible. You might be able to reduce the DNS downtime by reducing the TTL (Time-To-Live) value of the entries before changing them, if your name server service provider allows that. Here’s a guide for less painful DNS changes. A fair warning, though … Read more