Both use https and I want the main site, which uses the primary domain, to only be accessible through it’s www version. For the second site, since it’s a sub-domain, I only want it to only be available in https.

Let’s say the domain is mydomain.com and the subdomain is mysub.mydomain.com. The only URLs I want to be available are:

• https://www.mydomain.com
• https://mysub.mydomain.com

Typically I would make the non-www to www redirection through the DNS provider, but for this website it was not possible.

The following is the configuration I used in my Web.config:

<rewrite>
    <rules>
        <rule name="Redirect from non www mydomain.com" stopProcessing="true">
            <match url=".*" />
            <conditions>
                <add input="{HTTP_HOST}" pattern="^mydomain.com$" />
            </conditions>
            <action type="Redirect" url="https://www.mydomain.com/{R:0}" redirectType="Permanent" />
        </rule>
        <rule name="Redirect from non https mydomain.com" stopProcessing="true">
            <match url=".*" />
            <conditions>
                <add input="{HTTPS}" pattern="^OFF$" />
                <add input="{HTTP_HOST}" pattern="^www.mydomain.com$" />
            </conditions>
            <action type="Redirect" url="https://www.mydomain.com/{R:0}" redirectType="Permanent" />
        </rule>
        <rule name="Redirect from non https mysub.mydomain.com" stopProcessing="true">
            <match url=".*" />
            <conditions>
                <add input="{HTTPS}" pattern="^OFF$" />
                <add input="{HTTP_HOST}" pattern="^mysub.mydomain.com$" />
            </conditions>
            <action type="Redirect" url="https://mysub.mydomain.com/{R:0}" redirectType="Permanent" />
        </rule>
    </rules>
</rewrite>

Hope this helps!

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