NTP server not syncing

I need some help regarding the NTP daemon. I have problem to make ntpd sync with any external NTP servers.

Linux eth0 IP is 192.168.10. To simplify troubleshooting I am using the default configuration.
Here is some output from the troubleshooting I did:

ntpd - NTP daemon program - Ver. 4.2.8p15

Quote:

# ntpq -np remote refid st t when poll reach delay offset jitter ============================================================================== 0.debian.pool.n .POOL. 16 p - 64 0 0.000 +0.000 0.002 1.debian.pool.n .POOL. 16 p - 64 0 0.000 +0.000 0.002 2.debian.pool.n .POOL. 16 p - 64 0 0.000 +0.000 0.002 3.debian.pool.n .POOL. 16 p - 64 0 0.000 +0.000 0.002

Quote:

# ntpq -c as ind assid status conf reach auth condition last_event cnt =========================================================== 1 14681 8811 yes none none rejectmobilize1 2 14682 8811 yes none none reject mobilize 1 3 14683 8811 yes none none reject mobilize 1 4 14684 8811 yes none none reject mobilize 1

All NTP servers are rejected, but why?

Quote:

ntpq> rv 14681 associd=14681 status=8811 conf, bcast, sel_reject, 1 event, mobilize, srcadr=0.0.0.0, srcport=0, srchost="0.debian.pool.ntp.org", dstadr=0.0.0.0, dstport=0, leap=11, stratum=16, precision=-19, rootdelay=0.000, rootdisp=0.000, refid=POOL, reftime=(no time), rec=(no time), reach=000, unreach=0, hmode=3, pmode=0, hpoll=6, ppoll=10, headway=18, flash=1400 peer_dist, peer_unreach, keyid=0, offset=+0.000, delay=0.000, dispersion=16000.000, jitter=0.002, filtdelay= 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00, filtoffset= +0.00 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00, filtdisp= 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 ntpq> ntpq> rv 14683 associd=14683 status=8811 conf, bcast, sel_reject, 1 event, mobilize, srcadr=0.0.0.0, srcport=0, srchost="2.debian.pool.ntp.org", dstadr=0.0.0.0, dstport=0, leap=11, stratum=16, precision=-19, rootdelay=0.000, rootdisp=0.000, refid=POOL, reftime=(no time), rec=(no time), reach=000, unreach=0, hmode=3, pmode=0, hpoll=6, ppoll=10, headway=5, flash=1400 peer_dist, peer_unreach, keyid=0, offset=+0.000, delay=0.000, dispersion=16000.000, jitter=0.002, filtdelay= 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00, filtoffset= +0.00 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00 +0.00, filtdisp= 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0 16000.0

Source and destination is 0.0.0.0 Is that correct?

I have tried to reinstall the ntp package without success. Nothing is blocking ntp towards internet. This is a a tcpdump capture:
Quote:

tcpdump udp port ntp .... 22:22:25.542319 IP 192.168.1.10.ntp > sucker.mfa.gr.ntp: NTPv4, Client, length 48 22:22:25.542636 IP 192.168.1.10.ntp > ntp1.xe.gr.ntp: NTPv4, Client, length 48 22:22:25.550535 IP sucker.mfa.gr.ntp > 192.168.1.10.ntp: NTPv4, Server, length 48 22:22:25.550933 IP ntp1.xe.gr.ntp > 192.168.1.10.ntp: NTPv4, Server, length 48 22:22:27.551988 IP 192.168.1.10.ntp > skevosd.arx.gr.ntp: NTPv4, Client, length 48 22:22:27.569547 IP skevosd.arx.gr.ntp > 192.168.1.10.ntp: NTPv4, Server, length 48 22:23:29.597352 IP 192.168.1.10.ntp > mail.l0nax.org.ntp: NTPv4, Client, length 48 22:23:29.651378 IP mail.l0nax.org.ntp > 192.168.1.10.ntp: NTPv4, Server, length 48 22:23:30.542338 IP 192.168.1.10.ntp > ipa225.1.tellas.gr.ntp: NTPv4, Client, length 48 22:23:31.542359 IP 192.168.1.10.ntp > 62.1.105.163.ntp: NTPv4, Client, length 48

There is no networking issue :
Quote:

#ntpdate -d 0.debian.pool.ntp.org 18 Mar 22:37:20 ntpdate[12713]: ntpdate 4.2.8p12@1.3728-o (1) Looking for host 0.debian.pool.ntp.org and service ntp 217.114.59.66 reversed to ns0.luns.net.uk host found : ns0.luns.net.uk transmit(217.114.59.66) receive(217.114.59.66) transmit(178.17.160.12) receive(178.17.160.12) transmit(188.114.116.1) receive(188.114.116.1) transmit(50.205.244.21) receive(50.205.244.21) transmit(217.114.59.66) receive(217.114.59.66) transmit(178.17.160.12) receive(178.17.160.12) transmit(188.114.116.1) receive(188.114.116.1) transmit(50.205.244.21) receive(50.205.244.21) transmit(217.114.59.66) receive(217.114.59.66) transmit(178.17.160.12) receive(178.17.160.12) transmit(188.114.116.1) receive(188.114.116.1) transmit(50.205.244.21) receive(50.205.244.21) transmit(217.114.59.66) receive(217.114.59.66) transmit(178.17.160.12) receive(178.17.160.12) transmit(188.114.116.1) receive(188.114.116.1) transmit(50.205.244.21) receive(50.205.244.21) server 217.114.59.66, port 123 stratum 2, precision -20, leap 00, trust 000 refid [157.44.176.4], root delay 0.005096, root dispersion 0.018936 transmitted 4, in filter 4 reference time: e3fe3875.de4769f8 Thu, Mar 18 2021 22:37:09.868 originate timestamp: e3fe3896.caf64aad Thu, Mar 18 2021 22:37:42.792 transmit timestamp: e3fe3886.c6808fdd Thu, Mar 18 2021 22:37:26.775 filter delay: 0.08784 0.08081 0.08160 0.08055 0.00000 0.00000 0.00000 0.00000 filter offset: 15.99312 15.99007 15.99036 15.98993 0.000000 0.000000 0.000000 0.000000 delay 0.08055, dispersion 0.00056 offset 15.989931 server 178.17.160.12, port 123 stratum 2, precision -23, leap 00, trust 000 refid [47.187.174.51], root delay 0.135544, root dispersion 0.242020 transmitted 4, in filter 4 reference time: e3fe3606.d5c17d79 Thu, Mar 18 2021 22:26:46.834 originate timestamp: e3fe3896.e85c0197 Thu, Mar 18 2021 22:37:42.907 transmit timestamp: e3fe3886.f9b363d2 Thu, Mar 18 2021 22:37:26.975 filter delay: 0.09550 0.09355 0.09375 0.09328 0.00000 0.00000 0.00000 0.00000 filter offset: 15.89899 15.89840 15.89863 15.89838 0.000000 0.000000 0.000000 0.000000 delay 0.09328, dispersion 0.00015 offset 15.898386 server 188.114.116.1, port 123 stratum 2, precision -24, leap 00, trust 000 refid [114.199.6.79], root delay 0.004318, root dispersion 0.038391 transmitted 4, in filter 4 reference time: e3fe3296.0ea3aec5 Thu, Mar 18 2021 22:12:06.057 originate timestamp: e3fe3897.30f08e38 Thu, Mar 18 2021 22:37:43.191 transmit timestamp: e3fe3887.2ce6549e Thu, Mar 18 2021 22:37:27.175 filter delay: 0.07771 0.07642 0.16254 0.07607 0.00000 0.00000 0.00000 0.00000 filter offset: 15.99090 15.99089 16.03402 15.99053 0.000000 0.000000 0.000000 0.000000 delay 0.07607, dispersion 0.00569 offset 15.990531 server 50.205.244.21, port 123 stratum 2, precision -21, leap 00, trust 000 refid [50.205.244.28], root delay 0.000397, root dispersion 0.020447 transmitted 4, in filter 4 reference time: e3fe37d0.ae162649 Thu, Mar 18 2021 22:34:24.680 originate timestamp: e3fe3897.70b9e0e3 Thu, Mar 18 2021 22:37:43.440 transmit timestamp: e3fe3887.60196d98 Thu, Mar 18 2021 22:37:27.375 filter delay: 0.16942 0.16629 0.16681 0.16716 0.00000 0.00000 0.00000 0.00000 filter offset: 15.99488 15.99414 15.99416 15.99413 0.000000 0.000000 0.000000 0.000000 delay 0.16629, dispersion 0.00009 offset 15.994145 18 Mar 22:37:27 ntpdate[12713]: step time server 188.114.116.1 offset 15.990531 sec

Any idea why my ntp server cannot sync ?
Any idea is appreciated