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From Mark Mentovai <>
Subject RE: How can I hide web server from netcraft?
Date Tue, 16 Jul 2002 13:04:40 GMT
Werner Schalk wrote:
> is there a way to stop netcraft
> from detecting the os? which firewall
> rules on linux could apply?

(This isn't strictly an Apache question, but)

Fat chance.  Subtle behaviors that distinguish one operating system (or even OS 
release) from another are controlled by the kernel, you would need to make many 
changes, probably at the expense of performance or correctness, just to mask a 
bit of information.  And, as Owen mentioned, don't convince yourself that doing 
so would make you any less vulnerable to whatever security issues potentially 

If you're embarassed about running Linux, run something else.

You should be able to find a few papers and some other information by searching 
for "OS detection".


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