Hi

A well known recruitment agency has built a web portal to manage our recruitment process (they do this with many other companies, but their knowledge is rather limited). This means that anyone visiting our current vacancies page will actually go to this portal under a different domain.
I'm not particularly knowledgable about different types of forwarding, but am concerned that this could create problems. From my understanding a 301 redirect would be silly because then would just pass on any pagerank we have for the page to the portal, and in the end the portal's address would start showing up in Google instead. I don't know whether there are ways of redirecting traffic to a page without telling Google anything, and whether that may carry a penalty?

Any suggestions?

thanks