I don't think so, at least I know for a fact that netcraft can see zope even if it is behind apache in proxy mode. Look up e.g. www.zope.com to see for yourself. Zope sends the Server header, which apache doesn't rewrite if it isn't explicitly told so.

It's not that simple, there are other variables involved, although I don't know which exactly. Cuold ver verison of Apache and method (RewriteRule vs ProxyPass maybe?). See for example: www.torped.se, which has been Zope behind Apache for years. Still sais it's Apache. Best Regards Lennart Regebro Torped Strategi och Kommunikation AB