This little gem is probably one of those diagnostic tools that — like BackOrifice and Metasploit Framework — in the right hands is a good diagnostic tool and in the wrong hands is a bad diagnostic tool:
“ServerSniff.net – Your free “Swiss Army Knife” for networking, serverchecks and routing with many many little toys and tools for administrators, webmasters, developers, powerusers und security-aware users.
“Tools for webmasters and developers:
“Benchmarks and informations about servers, routing, IP-Stacks, encryption, security, nameservers and domains.
“Tools for powerusers:
“For powerusers ServerSniff.net offers computing Hashes for strings and files and simply a lot of information about servers, ssl-encryption, domains etc.
“ServerSniff.net gathers only public information about servers and networks from publicly available sources or from asking the servers directly.”