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  • Set UseHttps configuration option
  • Redirect traffic in code
  • Redirect traffic on IIS
  • SSL versus Transport Layer Security (TLS)
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  1. Reference
  2. Security

HTTPS

This article covers the recommended way of working with HTTPS and Umbraco CMS.

PreviousSetup Umbraco for a FIPS Compliant ServerNextTwo-factor Authentication

Last updated 11 months ago

We highly encourage the use of HTTPS on Umbraco websites especially in production environments. By using HTTPS you greatly improve the security of your website.

There are multiple benefits of HTTPS:

  • Trust - when your site is delivered over HTTPS your users will see that your site is secured, they are able to view the certificate assigned to your site and know that your site is legitimate

  • Removing an attack vector called (or network Sniffing)

  • Guards against , an attacker will have a hard time obtaining an authentic Secure Sockets Layer (SSL) certificate

  • Google likes HTTPS, it may help your site's rankings

Another benefits of HTTPS is that you are able to use the protocol if your web server and browser support it.

Set UseHttps configuration option

Umbraco allows you to force HTTPS for all backoffice communications by using the following configuration:

In Umbraco 9, set the UseHttps key in appSettings to true.

{
    "Umbraco": {
        "CMS": {
            "Global": {
                "UseHttps": true
            }
        }
    }
}

This options does multiple things when it is turned on:

  • All non-https requests to any backoffice controller are redirected to https

  • All self delivered Umbraco requests are performed over https

  • All Umbraco notification emails with links generated have https links

  • All authorization attempts for backoffice handlers and services will be denied if the request is not over https

Redirect traffic in code

The .NET5+ way to handle this, is by adding this HttpsRedirectionMiddleware to your pipeline in Program.cs. This can be done by adding app.UseHttpsRedirection(); before the call to app.UseUmbraco() in the Configure method:

app.UseHttpsRedirection();

    app.UseUmbraco()
        .WithMiddleware(u =>
        {
            u.UseBackOffice();
            u.UseWebsite();
        })
        .WithEndpoints(u =>
        {
            u.UseBackOfficeEndpoints();
            u.UseWebsiteEndpoints();
        });

Redirect traffic on IIS

Once you enable HTTPS for your site you should redirect all requests to your site to HTTPS. This can be done with an IIS rewrite rule. The IIS rewrite module needs to be installed for this to work, most hosting providers will have that enabled by default.

In your web.config find or add the <system.webServer><rewrite><rules> section and put the following rule in there. This rule will redirect all requests for the site http://mysite.com URL to the secure https://mysite.com URL and respond with a permanent redirect status.

<rule name="HTTP to HTTPS redirect" stopProcessing="true">
    <match url="(.*)" />
    <conditions>
        <add input="{HTTPS}" pattern="off" ignoreCase="true" />
        <add input="{HTTP_HOST}" pattern="localhost" negate="true" />
    </conditions>
    <action type="Redirect" url="https://{HTTP_HOST}/{R:1}" redirectType="Permanent" />
</rule>

The rule includes an ignore for localhost. If you run your local environment on a different URL than localhost you can add additional ignore rules. Additionally, if you have a staging environment that doesn't run on HTTPS, you can add that to the ignore rules too.

SSL versus Transport Layer Security (TLS)

While the deprecated SSL (2.0 and 3.0) are not supported anymore by modern browsers, some of the Umbraco configuration still uses SSL. But rest assured, that is only the name.

Ensures that the backoffice authentication cookie is set to (so it can only be transmitted over https)

In HTTPS, the communication protocol is encrypted using Transport Layer Security (TLS), or, formerly, its predecessor, Secure Sockets Layer (SSL) -

"Man in the middle"
Phishing
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