Now there's a forced redirect:
When customers of the provider 1&1 in Karlsruhe establish a new DSL connection and then start the browser, they are now always shown the 1&1 portal.
Great. And if these first requests come from some scripts of a server at the DSL connection, the scripts will fail. Just because 1&1 had another rarely stupid idea. And we have to explain to the customers again why something obscure doesn't work - and all of this just for marketing nonsense.