1NTPTRACE(1)                         NTPsec                         NTPTRACE(1)
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NAME

6       ntptrace - trace peers of an NTP server
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SYNOPSIS

9       ntptrace [-V | --version] [-n |--numeric]
10           [-m number | --max-hosts=number]
11           [-r host | --host=remote]
12           hostname
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DESCRIPTION

15       ntptrace is a python script that uses the ntpq utility program to
16       follow the chain of NTP servers from a given host back to the primary
17       time source.
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19       For ntptrace to work properly, each of these servers must implement the
20       NTP Control and Monitoring Protocol specified in RFC 1305 and enable
21       NTP Mode 6 control packets. Nowadays it is usual for public timeservers
22       to disable Mode 6 queries, so this script is unlikely to be very useful
23       unless you have a collection of specially-configured timeservers on
24       your LAN.
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26       If given no arguments, ntptrace starts with localhost. Here is an
27       example of the output from ntptrace:
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29           % ntptrace
30           localhost: stratum 4, offset 0.0019529, synch distance 0.144135
31           server2ozo.com: stratum 2, offset 0.0124263, synch distance 0.115784
32           usndh.edu: stratum 1, offset 0.0019298, synch distance 0.011993, refid 'GPS'
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34       On each line, the fields are (left to right): the host name, the host
35       stratum, the time offset between that host and the local host (as
36       measured by ntptrace; this is why it is not always zero for
37       "localhost"), the host synchronization distance, and (only for
38       stratum-1 servers) the reference clock ID. All times are given in
39       seconds. Note that the stratum is the server hop count to the primary
40       source, while the synchronization distance is the estimated error
41       relative to the primary source. These terms are precisely defined in
42       RFC 1305.
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OPTIONS

45       -n, --numeric
46           Print IP addresses instead of hostnames.
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48           Output hosts as dotted-quad numeric format rather than converting
49           to the canonical host names.
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51       -m number, --max-hosts=number
52           Maximum number of peers to trace. This option takes an integer
53           number as its argument. The default number for this option is 99.
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55       -r string, --host=string
56           Trace a single remote host.
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58       -V, --version
59           Print the version string and exit.
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EXIT STATUS

62       One of the following exit values will be returned:
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64       0 (EXIT_SUCCESS)
65           Successful program execution.
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67       1 (EXIT_FAILURE)
68           The operation failed or the invocation was not valid.
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72NTPsec                            2021-02-01                       NTPTRACE(1)
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