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