nmap ?

[Michael Chrisco <MChrisco () jackhenry com>]

Don't know if this is the correct list or not.

Why does nmap show UDP port 68 as closed filtered when you scan a device that has all ports firewalled?
It does an ARP so it knows a device is there but then it treats not getting a response back for 68 different than all 
the others.
A scan of a network with -sU -p 68 -Pn basically shows the same host # results as an ARP scan of -sn -n -Pn -PR.

Why does nmap show a list of all the ports closed if the range of port to be scanned is less than 25 for TCP and UDP?
-p 50-74 shows the list, -p 50-75 does not.

Thanks,
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