user@machine:~$ ntpdate -q 44.0.0.1

server 44.0.0.1, stratum 2, offset 0.006765, delay 0.09117

24 Oct 22:53:28 ntpdate[2358]: adjust time server 44.0.0.1 offset 0.006765 sec

root@OpenWrt:~# tcpdump -vvn -i tunl0 port 123

tcpdump: listening on tunl0, link-type RAW (Raw IP), capture size 262144 bytes

02:53:28.015158 IP (tos 0x0, ttl 63, id 45381, offset 0, flags [DF], proto UDP (17), length 76)

    44.60.44.128.40861 > 44.0.0.1.123: [udp sum ok] NTPv4, length 48

        Client, Leap indicator: clock unsynchronized (192), Stratum 0 (unspecified), poll 3 (8s), precision -6

        Root Delay: 1.000000, Root dispersion: 1.000000, Reference-ID: (unspec)

          Reference Timestamp:  0.000000000

          Originator Timestamp: 0.000000000

          Receive Timestamp:    0.000000000

          Transmit Timestamp:   3875655208.011475472 (2022/10/25 02:53:28)

            Originator - Receive Timestamp:  0.000000000

            Originator - Transmit Timestamp: 3875655208.011475472 (2022/10/25 02:53:28)

02:53:28.079405 IP (tos 0xb8, ttl 62, id 48601, offset 0, flags [none], proto UDP (17), length 76)

    44.0.0.1.123 > 44.60.44.128.40861: [udp sum ok] NTPv4, length 48

        Server, Leap indicator:  (0), Stratum 2 (secondary reference), poll 3 (8s), precision -24

        Root Delay: 0.000213, Root dispersion: 0.037979, Reference-ID: 132.239.1.6

          Reference Timestamp:  3875654362.142300152 (2022/10/25 02:39:22)

          Originator Timestamp: 3875655208.011475472 (2022/10/25 02:53:28)

          Receive Timestamp:    3875655208.051018718 (2022/10/25 02:53:28)

          Transmit Timestamp:   3875655208.051066605 (2022/10/25 02:53:28)

            Originator - Receive Timestamp:  +0.039543245

            Originator - Transmit Timestamp: +0.039591132