Rich Healey wrote: > put them all in the same subnet (ie 192.168.0.128-255) and then nmap -sS > - -PN 192.168.0.128/25 | grep [uU][Pp] What does it mean to say 192.168.0.128/25 ? Instead, I settled on to sudo nmap -sS -PN 192.168.1.1-255 It seems to be working... thanks raju