How can fragment packets -f/--mtu be usefull ?
That is, say from a normal scan I get for a given IP and port range:
28/tcp filtered unknown no-response 29/tcp filtered msg-icp no-response 30/tcp filtered unknown no-response 31/tcp filtered msg-auth no-response
can this "no-response" from the above be something else if I use -f/--mtu
Note that I tried a few IPs but got the same result.
I'd read in https://nmap.org/book/man-bypass-firewalls-ids.html that is helps bypass IDS/firewall, but how can I exploit this to make it reveal something other than "no-response" ?