RESPONSE_SERVER rewrite rule not working for all response headers

Question

I have a asp.net website called Home running in IIS and I added a rewrite URL rule to change the server tag in the response header to Mine. It only works for some of the responses and not all of them.

For example: https://myDomain/Home/Default.aspx works. (Server: Mine) But https://myDomain/Home/ does not work (Server: Microsoft...)

The code of my rule that can be found in C:\\Windows\\System32\\inetsrv\\config\\applicationHost.config are the following:

<rewrite>
        <allowedServerVariables>
            <add name="RESPONSE_SERVER" />
        </allowedServerVariables>
        <globalRules>
            <rule name="Remove Server">
                <match url=".*" />
                <serverVariables>
                    <set name="RESPONSE_SERVER" value="Mine" />
                </serverVariables>
                <action type="None" />
                <conditions>
                </conditions>
            </rule>
        </globalRules>
    </rewrite>

I am removing the server version for security reasons, but if it does not work for all responses, it defines the point.

Answer 1

As far as I know, if you want to modify the reponse header's value. I suggest you could try to use url rewrite outbound rule instead of normal rule.

Please add below rule in the application.host file:

<rewrite>

    <allowedServerVariables>
        <add name="RESPONSE_SERVER" />
    </allowedServerVariables>
    <outboundRules>
        <rule name="ModifyServer">
            <match serverVariable="RESPONSE_SERVER" pattern=".*" />
            <action type="Rewrite" value="Mine" />
        </rule>
    </outboundRules>
</rewrite>