Rookie question about differences between -S and -sI option

["Mark Fosseth" <brundleflynet () hotmail com>]

Hi All,

In terms of probing IPs which is the difference between scanning an host 
spoofing the source IP via -S option or scanning through an idle scan via 
the -sI option beside perspetive of course ?

I performed a normal -sS scan and later I issued the same command and option 
using also -S but despiting the fact the command started correctly I had no 
results even if the spoofed IP was online. Do you have an idea what I am 
missing ?

Thanks

Yashin



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