Hi, For some reason the -f switch crashes the system only if you use the loopback IP or the IP assigned to your box. The -f switch works fine if you use it on a IP besides your own (tried it against a server I have).
# nmap -f 127.0.0.1 (crashes) (then drops to the kernel debugger I think) I did:
boot reboot
# nmap -f 192.x.x.x (same thing but with a different error)
boot reboot
By this point I was wondering if the -f switch worked at all So: # nmap -f 192.x.x.x (my server IP) blah blah blah. (works just fine) Can someone test this out and see if it works for them?