nmap udp scan time

From: "Kevin Mc Grath" <kpmcgrath81@xxxxxxxxx>
Date: Fri, 26 Oct 2007 09:53:36 +0200

Hi all,

I have completed a udp scan on an embedded device in the lab and the
scan duration was 18.22 hours.

The scan syntax used is as follows:

nmap -sU -p0-65535 <ip_addr>

Should a UDP scan take such a long time? Could the scan time relate to
some problem with the device?

Kind Regards
Kevin

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