In case, you wonder about enterprise portal, you should rest assured that it has been the best entry point to an intranet rather than the internet. It has been meant to serve various kinds of customers, suppliers and employees of a firm, an enterprise portal providing the same services as web portal.
It would be inclusive of search engine, email, customized and up-to-date content. It would also be required to provide direct access to internet or other available portals. You would be able to gain access to an enterprise portal. You should rest assured that it would be controlled through passwords and the requisite data would be protected behind a firewall.