Ok here the thing.
our internal MOSS server has an address (for example) http://sharepointserver:22456
externally from the the internet it is accessed via (for example) http://portal.office.com
So, if I want to go to the 'accounts' site internally it'll look like:-
BUT if i click on a subfolder,discussion,tasks
etc from the external portal, the first part of the url (http://portal.office...etc
) reverts back to the internal address (http:sharepointserver:22456
) and from the internet I get 'page cannot be displayed' :-(