2011/6/8 Out of Nowhere <[log in to unmask]>:
> Why is the OS marked as unknown? How can I hide the os info/signature?
> http://toolbar.netcraft.com/site_report?url=http://www.fnal.gov
I think netcraft uses apache server signature to detect os/httpd. You
can use mod_security parameter SecServerSignature "unknown" to hide
server information.
--
Eero