I have an Umbraco site eg www.domain.com.  I want to setup a reverse Proxy to mask a wordpress blog at www.wpblog.com so that it appears at www.domain.com/blog/.

I have created a test non-umbraco application to test this theory and it works perfectly using the following code from iis.net.  If i put the first rewrite rule into my umbraco web.config it works (bug clicking on links produces a 404) but as soon as i add the outbound rules the whole site just goes blank without any error codes.

<rewrite>
    <rules>
        <rule name="Reverse Proxy to blog" stopProcessing="true">
            <match url="^blog/(.*)" />
            <action type="Rewrite" url="http://www.wpblog/{R:1}" />
        </rule>
 
    </rules>
    <outboundRules>
        <rule name="Add application prefix" preCondition="IsHTML">
            <match filterByTags="A" pattern="^/(.*)" />
            <conditions>
                <add input="{URL}" pattern="^/(blog)/.*" />
            </conditions>
            <action type="Rewrite" value="/{C:1}/{R:1}" />
        </rule>
        <preConditions>
            <preCondition name="IsHTML">
                <add input="{RESPONSE_CONTENT_TYPE}" pattern="^text/html" />
            </preCondition>
        </preConditions>
    </outboundRules>
</rewrite>

Any help would be much appreciated.