What is your setup and what are the exact symptoms?
In oder to understand, what kind of problem you might have faced, i set up a simple host-node map with a frsh hostname "hugo" directing to a subsite node "ss". When i surved to "hugo", the browser went into a redirect loop. It turned out that (a) i was not logged in at the subsite, and (b) the subsite did not have read permissions for the public. after granting on the subsite "ss" read permissions to the public, everthing seems fine.
