nmap input list

[Daniel Garcia <daniel () danielgarcia info>]

Hello,

I executed nmap with a list of IPs as follows

nmap -sn -n -PE -iL input.txt -oX output.txt

The input file is one IPv4 address per line (in no particular order). I
from the 189 IPs, 7 return back no output in the XML. They appear to be
down. I can ping them using ping and also via nmap:

nmap -sn -n -PE -oX output.txt x.x.x.x

the "down" ips. If I sort the input list (unix command line sort)

cat input.txt | sort > input2.txt

and reissue the nmap command:

nmap -sn -n -PE -iL input2.txt -oX output.txt

All 189 IPs are up. Is there some undocumented behaviour related to the
input list?

Regards,
Daniel
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