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My coworkers seem to have -nU (no udp) as an option for their nmap scripts but I've never seen this in use and when I try to use this option with nmap, it does not work. I thought no udp was enabled by default and -sU had to be used for udp to be scanned. Is this correct?

  • nothing in the man pages either – UCProgrammer Jul 12 '18 at 15:50
  • Perhaps your co-workers have added that option themselves – Joe Jul 12 '18 at 15:55
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-nU is not a valid Nmap option. You are correct that UDP will only be scanned if you use the -sU option.

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