To make one open port undetectable with an external nmap scan, it seems easier to make all other scanned port appear as being opened than to try to make this port appear as being closed.How can I configure my system in order so that all scanned ports externally with nmap are found to be open?For instance, with a scan of 1000 port an external scanner would see all 1000 ports as open whatever my real open port may be.
How to make a port appear as being open everytime it is scanned with nmap independantly of its open/close state?
networking;security;port forwarding;nmap