31Eki
nmap not scanning for host
nmap keeps showing different and wrong results whenever I perform a scan to see how many hosts are up on my subnet. See the following scan reports.
The first scan I made was not with superuser privilege. The second scan was made to see if it makes any difference if I had superuser privilege. The third scan I made was specific for a particular IP address (which was up during first 2 scans as well but was not reported by it). Any ideas?
papagolf@Sierra ~ % nmap -sn 192.168.1.1-255
Starting Nmap 7.25BETA2 ( https://nmap.org ) at 2016-10-31 18:50 IST
Nmap scan report for www.netis.cc (192.168.1.1)
Host is up (0.0048s latency).
Nmap scan report for 192.168.1.4
Host is up (0.00014s latency).
Nmap done: 255 IP addresses (2 hosts up) scanned in 19.31 seconds
papagolf@Sierra ~ % sudo nmap -sn 192.168.1.1-255
[sudo] password for papagolf:
Starting Nmap 7.25BETA2 ( https://nmap.org ) at 2016-10-31 18:51 IST
Nmap scan report for 192.168.1.4
Host is up.
Nmap done: 255 IP addresses (1 host up) scanned in 26.98 seconds
papagolf@Sierra ~ % sudo nmap -sn 192.168.1.3
Starting Nmap 7.25BETA2 ( https://nmap.org ) at 2016-10-31 18:52 IST
Nmap scan report for 192.168.1.3
Host is up (0.0030s latency).
MAC Address: B0:47:BF:AC:A6:C4 (Samsung Electronics)
Nmap done: 1 IP address (1 host up) scanned in 16.78 seconds
