External portal capturing internal portal URL in Log and trace file

Hi,

We are facing one issue in portal like we have two portals for internal (Intranet) and external (Internet) users.

Once users logged in the application and try to get the information about mylink from the external portal link (internet) they should not get any information about the internal portal.

But in log and trace file we can see the external portal link capturing the internal portal URL.

We need to find, from where system capturing the internal portal URL.

Thanks.