Hello list, I have a problem. I am trying to portscan an entire network (Nope, I'm not a script kiddie, I just have to find out what Linux boxen are installed on the corporate network which I am supposed to administer), and I use `nmap -O XXX.XXX.XXX.0/24` as root to find out the OS the boxen are running. Unfortunately, nmap is unable to find some hosts when scanning an entire network. However if I portscan that machine directly, it is up and running and nmap reports the open ports correctly.
Any idea, what could be the cause for nmap's failure to correctly identify a box as up? This box has no ipchains installed and it is responding to pings like a charm. Are there any other tools that reliably tell whether a machine is up or not? TIA, Viktor -- Viktor Rosenfeld WWW: http://www.informatik.hu-berlin.de/~rosenfel/ Geek Code (3.1): GCS/SS d-@ s+: a20 C++@ UL++$ P+ L+++ E--- W++ N++ o? K? !W O? M? V? PS++@ PE+(-) Y+ P?(+++) t+ 5+ X- R? !tv b+ DI+ D- G e>+++ h-- r- !y+
