Well...
$ ifconfig nfe0

nfe0: flags=8843 mtu 1500

         lladdr 00:e0:81:5c:e6:a0

         media: Ethernet autoselect (1000baseT full-duplex,master)

         status: active

         inet 192.168.1.245 netmask 0xffffff00 broadcast 192.168.1.255

         inet6 fe80::2e0:81ff:fe5c:e6a0%nfe0 prefixlen 64 scopeid 0x1
$ cat /etc/ntpd.conf

# $OpenBSD: ntpd.conf,v 1.8 2007/07/13 09:05:52 henning Exp $

# sample ntpd configuration file, see ntpd.conf(5)
# Addresses to listen on (ntpd does not listen by default)

listen on 192.168.1.245
# sync to a single server

#server ntp.example.org

#server yes
# use a random selection of 8 public stratum 2 servers

# see http://support.ntp.org/bin/view/Servers/NTPPoolServers

servers es.pool.ntp.org
but... ?no 'LISTEN' state in port 123?
$ netstat -an | grep LISTEN

tcp        0      0  127.0.0.1.587          *.*                    LISTEN

tcp        0      0  127.0.0.1.25           *.*                    LISTEN

tcp        0      0  *.1721                 *.*                    LISTEN

tcp        0      0  *.37                   *.*                    LISTEN

tcp        0      0  *.13                   *.*                    LISTEN

tcp        0      0  *.113                  *.*                    LISTEN

tcp6       0      0  ::1.587                *.*                    LISTEN

tcp6       0      0  ::1.25                 *.*                    LISTEN

tcp6       0      0  *.1721                 *.*                    LISTEN

tcp6       0      0  *.37                   *.*                    LISTEN

tcp6       0      0  *.13                   *.*                    LISTEN

tcp6       0      0  *.113                  *.*                    LISTEN
?????
--

Thanks,

Jordi Espasa Clofent