22 Feb
2017
22 Feb
'17
2:22 p.m.
On 22/02/17 13:50, Chris Green wrote:
I want a fast (as in less than a second, not 'computer fast') way of checking if a particular private IP is present on the LAN.
[SNIP]
---- cut here ---- ~ $ nmap -sn 10.0.1.254
Starting Nmap 6.40 ( http://nmap.org ) at 2017-02-22 14:16 GMT Nmap scan report for 10.0.1.254 Host is up (0.00078s latency). Nmap done: 1 IP address (1 host up) scanned in 0.00 seconds
~ $ nmap -sn 10.0.1.80
Starting Nmap 6.40 ( http://nmap.org ) at 2017-02-22 14:17 GMT 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 3.00 seconds
---- cut here ----
If it's there it's faster, so just change your logic...
Cheers, Laurie.
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Laurie Brown
laurie@brownowl.com
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