[suse-security] Switch off recognition of apache versions by i.e VisualRoute?

Dear colleagues, I wonder if it is possible to disable the apache version and modules discovery for programs like VisualRoute. This seems to have nothing to do with "ServerSignature Off". I really don't know how these Programs gather such critical information. Any ideas would be very much appreciated. Greetings Uli || Ulrich Klaus, ICQ# 136970884