[ale] Nmap host up/down status

[Chris Fowler]

I had to add Pn 

[root at test]# time nmap -sn -PE -PP -PM -PO -n 10.139.128.170 2>&1 

Starting Nmap 5.61TEST4 ( http://nmap.org ) at 2014-10-10 20:55 UTC 
Note: Host seems down. If it is really up, but blocking our ping probes, try -Pn 
Nmap done: 1 IP address (0 hosts up) scanned in 3.04 seconds 
real 0m 3.05s 
user 0m 0.01s 
sys 0m 0.02s 

[root at test]# time nmap -sn -PE -PP -PM -PO -Pn -n 10.139.128.170 2>&1 

Starting Nmap 5.61TEST4 ( http://nmap.org ) at 2014-10-10 20:55 UTC 
Nmap scan report for 10.139.128.170 
Host is up. 
Nmap done: 1 IP address (1 host up) scanned in 0.01 seconds 
real 0m 0.02s 
user 0m 0.00s 
sys 0m 0.01s 
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