nmap -p PUERTO -sU -P0 IP
# nmap -p 1195 -sU -P0 62.97.109.18 Starting Nmap 6.47 ( http://nmap.org ) at 2015-06-30 09:47 CEST Nmap scan report for 62.97.109.18.es.colt.net (62.97.109.18) Host is up. PORT STATE SERVICE 1195/udp open|filtered unknown Nmap done: 1 IP address (1 host up) scanned in 2.15 seconds