I have a Linux Kali guest inside a virtualbox network.
The network is set as "NAT Network" with 192.168.1.0/24 as CIDR.
The DHCP is disabled and default gateway (using the command "ip route") is 192.168.1.1
With Kali I'm using nmap on the ip "10.10.10.10" and I expect that IP is not reachable but really I have different results everytime I run it.
Sometimes I received this:
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root@kali:~# nmap 10.10.10.10
Starting Nmap 7.80 at 2019-10-22 13:02 IST
Nmap scan report for 10.10.10.10
Host is up (0.0016s latency).
Not shown: 994 filtered ports
PORT STATE SERVICE
25/tcp open smtp
110/tcp open pop3
143/tcp open imap
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
Nmap done: 1 IP address (1 host up) scanned in 5.52 seconds
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root@kali:~# nmap 10.10.10.10
Starting Nmap 7.80 at 2019-10-22 13:02 IST
Nmap scan report for 10.10.10.10
Host is up (0.00024s latency).
All 1000 scanned ports on 10.10.10.10 are filtered
Nmap done: 1 IP address (1 host up) scanned in 4.27 seconds
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root@kali:~# nmap 192.168.1.1
Starting Nmap 7.80 at 2019-10-22 13:02 IST
Nmap scan report for 192.168.1.1
Host is up (0.000083s latency).
Not shown: 999 closed ports
PORT STATE SERVICE
53/tcp open domain
MAC Address: 52:54:00:12:35:00 (QEMU virtual NIC)
Nmap done: 1 IP address (1 host up) scanned in 0.27 seconds
How can I check that?
Why is it different time to time?
Thanks