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When entering this URL in your browser: http://mycompany.com:8080/portal, you will be directed to a default site.
To configure your site as default, add the following content to sites-definition.xml,
inside <init-params>:
<value-param>
<name>default.portal</name>
<description></description>
<value>mysite</value>
</value-param>
Note that the <value-param> tags should be added right after the <init-params> opening tag.