>There are at least three easy ways to check what operating system runs on >the remote machine (let's assume it's got the HTTP port open): > >1. nmap -O -p 80 host.name.com > You don't want to scan them :), that's why the -p What's the -O option? For some reason, I can't find any info for it; I am missing nmap's man page(!) TIA Sven