NTP Server - sync from local system clock

I need to create device (currently Raspberry Pi 3 based) which states as NTP Server, it has no connection to Internet and NTP should read actual time from local system clock (this clock is set from application). My /etc/ntp.conf is: restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery restrict 127.0.0.1 restrict -6 ::1 restrict ::1 server 127.127.1.0 # local clock fudge 127.127.1.0 stratum 1 driftfile /var/lib/ntp/ntp.drift logfile /var/log/ntp.log When testing connection (after service ntp restart) with ntpdate -du localhost command I get this output: transmit(::1) receive(::1) transmit(127.0.0.1) receive(127.0.0.1) transmit(::1) receive(::1) transmit(127.0.0.1) receive(127.0.0.1) transmit(::1) receive(::1) transmit(127.0.0.1) receive(127.0.0.1) transmit(::1) receive(::1) transmit(127.0.0.1) receive(127.0.0.1) ::1: Server dropped: strata too high 127.0.0.1: Server dropped: strata too high server ::1, port 123 stratum 16, precision -20, leap 11, trust 000 refid [::1], delay 0.02573, dispersion 0.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 6:28:16.000 originate timestamp: ddbf0da9.473a860b Tue, Nov 21 2017 20:40:09.278 transmit timestamp: ddbf0da9.47320583 Tue, Nov 21 2017 20:40:09.278 filter delay: 0.02579 0.02573 0.02574 0.02573 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000018 -0.00001 -0.00000 -0.00001 0.000000 0.000000 0.000000 0.000000 delay 0.02573, dispersion 0.00000 offset -0.000011 server 127.0.0.1, port 123 stratum 16, precision -20, leap 11, trust 000 refid [127.0.0.1], delay 0.02570, dispersion 0.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 6:28:16.000 originate timestamp: ddbf0da9.7a812105 Tue, Nov 21 2017 20:40:09.478 transmit timestamp: ddbf0da9.7a7990a1 Tue, Nov 21 2017 20:40:09.478 filter delay: 0.02571 0.02570 0.02570 0.02570 0.00000 0.00000 0.00000 0.00000 filter offset: -0.00000 -0.00001 -0.00001 -0.00001 0.000000 0.000000 0.000000 0.000000 delay 0.02570, dispersion 0.00000 offset -0.000013 21 Nov 20:40:09 ntpdate: no server suitable for synchronization found What am I doing wrong? Why ntp does not get time from system clock?