9Şub
How to perform focused scan of public IP using nmap? [duplicate]
Scanning my router using the private IP address using nmap reveals the open ports:
Obtaining the public IP address of the router can be achieved by executing the command:
nslookup myip.opendns.com resolver1.opendns.com
If I scan my router using the public IP address, I get a whole more open ports than those revealed in the scan using the private IP address:
Am not sure why is that; If I scan the public IP for the ports found in the private IP scan, I get the same result of the private IP scan as expected:
nmap -p 21,22,23,80,139,445,5431 <Public_IP>
How can I perform accurate scan of a public IP address to reveal the actually open ports of the corresponding device?
