• Nmap – blocked ports
• Nmap – Firewall enabled smaller packets

 

Use nmap when ports are filtered – Different scans below may show all ports filtered. If ping sweep picks box up try Zombie scan from another active box

From Kali box

A.      Direct scan – nmap ipaddress

B.       Syn Scan – nmap –sS ipaddress

C.      Intense scan – nmap –T4 –A ipaddress

D.      Ping sweep – nmap –sP 10.10.10.0/24  (ip range)

E.       Zombie scan – nmap –sI 10.10.10.12 10.10.10.10  (Here target is 10.10.10.10 and .12 is the zombie

If firewall blocking try small packets instead of one big one

A.      Type nmap –mtu 8 ipaddress