How to configure HSTs on www and other subdomains?

How to configure HSTs on www and other subdomains?

First, you can create a two-stage redirect for all HTTP traffic. Second, your primary site can be located on the root domain. If we chose the first option we will need to create two redirect methods. The first will move traffic from non-www and HTTP to HTTPS and then to the www subdomain.

Is the root domain eligible for the HSTS Preload list?

The reason we create the redirects like this is it allows us to server the HSTS header with the includeSubDomains directive on the root domain. The HSTS preload list only includes root domains. www.danielmorell.com is not eligible for the preload list since it is a subdomain.

What does includeSubDomains mean in http Strict Transport Security?

Based on the RFC, HTTP Strict Transport Security (HSTS), the includeSubDomains states: 6.1.2. The OPTIONAL “includeSubDomains” directive is a valueless directive which, if present (i.e., it is “asserted”), signals the UA that the HSTS Policy applies to this HSTS Host as well as any subdomains of the host’s domain name.

What does the includeSubDomains directive in HSTs mean?

The includeSubDomains Directive. The OPTIONAL “includeSubDomains” directive is a valueless directive which, if present (i.e., it is “asserted”), signals the UA that the HSTS Policy applies to this HSTS Host as well as any subdomains of the host’s domain name.

Why do you not set the HSTS header on an HTTP response?

This ensures that the header will be set on server responses, like redirects, that do not typically include custom headers. Second, setting the HSTS header on an HTTP response is invalid. Therefore, we will want to avoid it and only serve the HSTS header over HTTPS.

How to enable http Strict Transport Security ( HSTs ) on IIS?

Scott Hanselman wrote a great post on how to enable HTTP Strict-Transport-Security (HSTS) on IIS web servers, and here is some more technical information about HSTS in IIS, and other security headers … Protip: IIS 8.5 is the IIS version used in Windows Server 2012 R2, IIS 10.0 in Windows Server 2016 and up.

Do you have to use HTTPS on a subdomain?

But section 11.4.1 says that all subdomains must implement HTTPS, so as long as they do it should work just fine. because these services are offered over plain HTTP.

Can you use includeSubDomains on a subdomain?

Yes. includeSubDomains affects all subdomains of the domain name. Crucially, the domain name of foo.example.com is example.com so all compliant user agents will apply the HSTS restriction to *.example.com. 6.1.2.

What’s the best way to preload a HSTS list?

If your site is committed to HTTPS and you want to preload HSTS, we suggest the following steps: Examine all subdomains (and nested subdomains) of your site and make sure that they work properly over HTTPS. During each stage, check for broken pages and monitor your site’s metrics (e.g. traffic, revenue).

How does chrome redirect to a HSTS host?

Practically, this means that browsers will internally redirect requests to HTTPS prior to sending the request to the server. Some browsers like Edge simply change the URL and move on, others like Chrome use a 307 internal redirect. A Known HSTS Host is a domain that the browser knows implements HSTS.

Is it OK to add HSTs to root domain?

I don’t really want to change that: requests to the root domain are all set up with a permanent redirect to the www version and that’s all fine. I’ve enabled HSTS on the site, but the HSTS outbound header rule which I’ve added is never hit on the first request to the root of the domain because of the redirect.

Is it possible to enable HSTs on a website?

I’ve enabled HSTS on the site, but the HSTS outbound header rule which I’ve added is never hit on the first request to the root of the domain because of the redirect. (It works fine for subsequent https requests, because there’s no redirect).