Are you referring to fingerprinting tools that probe machines to discover SQL Server versions and other info? If so, the short answer is no and it's true for pretty much any other software. You can hide SQL Server (set in configuration manager) and that
will thwart most basic tools but there are still other ways to find what's installed and running on a given machine.
Those tools take advantage of features intended for legitimate users to perform both useful (e.g. discovery) work and sometimes for abuse (e.g. probing for live instances to attack). For example, ping can be abused via pingflood attacks but the root of the
problem is in non-legitimate users getting through.
In your situation, fingerprinting for SQL Server should be all but useless when done by someone outside of your corporate network as you really should not be exposing your database server directly to the internet. If the threat is from an internal source,
you might have more urgent problems to deal with than fingerprinting software.
+> Btw, what fingerprinting tool are you using?
No great genius has ever existed without some touch of madness. - Aristotle
