Useful nmap command

Traceroute to IP address

nmap -sn --traceroute remoteipaddress

Traceroute to port

nmap -Pn --traceroute -p 443 remoteipaddress

Output:

PORT STATE SERVICE
443/tcp open https

Open means its ok

PORT STATE SERVICE
443/tcp filtered https

Filtered means that a firewall or some filtering or other network issue is covering the port and preventing nmap from determining if the port is open.… Read the rest