Thanks for the tips: 1)the logout method work with shift+reload in IE (how would clear cached pages from zope?) 2)the <dtml-raise type="Unauthorized"> method does not allow me to log back in even when I try a redirect to a different page.

I am wondering if something is set incorrectly on my browser. If (2) works for you it must work for me to??

No, actually I hadn't thought of redirecting, but I guess it can't work. Either because the browser ignores the redirect after an 401 Unauthorized, or because of the nature of dtml-raise which maybe prevents zope from interpreting following code. Maybe someone can shed some light on that. Perhaps you could try this: <dtml-unless "AUTHENTICATED_USER.getUserName()=='Anonymous User'"> <dtml-raise type="Unauthorized"> Logout!! </dtml-raise> </dtml-unless> You are now logged out! Not very elegant (you have to enter one false login/pw combination for the unless to work), but perhaps someone else has a better idea. This may depend on why you want to log out - for just reaching Anonymous "status" this seems the right thing. Otherwise introducing a new kind of role might help "logout_user", so you could test for that. cheers, oliver