Lines Matching +full:system +full:- +full:clock +full:- +full:direction +full:- +full:out
6 .\" It has been AutoGen-ed May 25, 2024 at 12:03:50 AM by AutoGen 5.18.16
8 .\" and the template file agmdoc-cmd.tpl
14 .Op Fl \-option\-name
15 .Op Fl \-option\-name Ar value
46 host addresses written in numeric, dotted\-quad form,
62 .Bl -bullet -offset indent
72 .Sx Reference Clock Support
96 clock, and auxiliary commands that specify environmental variables
104 class D), or (r) a reference clock address (127.127.x.x).
111 If the Basic Socket Interface Extensions for IPv6 (RFC\-2553)
127 with the exception of reference clock addresses,
139 .Bl -tag -width indent
192 either a DNS name or an IP address in dotted\-quad notation.
199 .Bl -tag -width indent
203 In this mode the local clock can synchronized to the
205 the local clock.
209 radio clock.
210 In this mode the local clock can synchronized to the
212 the local clock.
219 persistent symmetric\-active mode association with the specified
221 In this mode the local clock can be synchronized to
223 clock.
290 .Bl -tag -width indent
360 It specifies the time\-to\-live
373 Versions 1\-4 are the choices, with version 4 the
389 .Bl -tag -width indent
400 server and client should operate using symmetric\-key or public\-key
413 and client should operate using symmetric\-key or public\-key
426 both the server and client should operate using symmetric\-key or
427 public\-key authentication as described in
432 we attempt to register with the mDNS system.
449 specification RFC\-1305 defines a scheme which provides
454 DES\-CBC.
456 5 (MD5) algorithm using a private key, commonly called keyed\-MD5.
457 Either algorithm computes a message digest, or one\-way hash, which
548 disrupt system timekeeping.
578 .Ss Symmetric\-Key Cryptography
579 The original RFC\-1305 specification allows any one of possibly
580 65,535 keys, each distinguished by a 32\-bit key identifier, to
628 described in RFC\-1305 and in addition the Autokey protocol,
656 All modes use in addition a variant of the S\-KEY scheme,
657 in which a pseudo\-random key list is generated and used
667 .Xr ntp\-keygen 1ntpkeygenmdoc
711 system call or equivalent in other systems.
712 By the system design
797 Bob sends Cathy a thing called a crypto\-NAK, which tells her
807 If all comes out okay, Denise and Bob continue as described above.
821 .Xr ntp\-keygen 1ntpkeygenmdoc
854 .Bl -tag -width indent
869 protocol defined in RFC\-1305.
900 .Bl -tag -width indent
971 Specifies the interval between re\-randomization of certain
975 deflect brute\-force attacks on the algorithms of the scheme;
995 arguments are 32\-bit unsigned
1001 .Bl -tag -width indent
1008 This could be due to a replay or a server clock time step.
1071 .Bl -tag -width indent
1077 .Bl -tag -width indent
1079 Enables recording of clock driver statistics information.
1081 received from a clock driver appends a line of the following form to
1084 .Bd -literal
1091 clock address in dotted\-quad notation.
1093 timecode received from the clock in decoded ASCII format, where
1095 In some clock drivers a good deal of additional information
1098 clock for further details.
1106 .Bd -literal
1113 address in dotted\-quad notation, The final message field includes the
1121 update of the local clock outputs a line of the following form to
1124 .Bd -literal
1131 show time offset (seconds), frequency offset (parts per million \-
1132 PPM), RMS jitter (seconds), Allan deviation (PPM) and clock
1143 .Bd -literal
1144 48773 10847.650 127.127.4.1 9714 \-0.001605376 0.000000000 0.001424877 0.000958674
1150 show the peer address in dotted\-quad notation and status,
1157 Enables recording of raw\-timestamp statistics information.
1162 received from a peer or clock driver appends a line of the
1165 .Bd -literal
1172 show the remote peer or clock address followed by the local address
1173 in dotted\-quad notation.
1185 .Bd -literal
1194 .Bl -tag -width indent
1196 Time in hours since the system was last rebooted.
1250 .Bl -tag -width indent
1263 .Bl -tag -width indent
1271 server, usually specified as a compile\-time constant.
1305 .Bl -tag -width indent
1337 is a 4\-digit year number (e.g., 1992).
1349 The term week is defined by computing day\-of\-year
1353 filename base: A dot, a 4\-digit year number, the letter
1355 and a 2\-digit week number.
1362 file name suffix consists of a dot, a 4\-digit year number, and
1363 a 2\-digit month.
1374 and an 8\-digit number.
1376 running at the start of the corresponding 24\-hour period.
1458 .Ss The Kiss\-of\-Death Packet
1464 for the system operator.
1466 for this purpose called the "kiss\-of\-death" (KoD) packet.
1468 to zero and the reference identifier field set to a four\-byte
1491 happens automatically at the client when the association times out.
1494 .Bl -tag -width indent
1512 and a kiss\-o'\-death packet returned if enabled.
1562 where a value of \-1 means "unlimited", the current default.
1577 restrict informational queries and attempts to do run\-time
1581 .Bl -tag -width indent
1589 If this flag is set when a rate violation occurs, a kiss\-o'\-death
1628 to become the default in ntp\-4.4.
1716 Remove a previously\-set restriction. This is useful for
1743 with the anycast paradigm described in RFC\-1546,
1775 and minimum feasible time\-to\-live (TTL) hops, depending
1802 in burst mode in order to reliably set the host clock
1805 in a volley of eight client/server at 2\-s intervals
1818 and the effects of implosion due to near\-simultaneous
1827 normally eight times the system poll interval,
1828 which starts out at the
1858 survivors in order to synchronize the clock.
1888 it the system poll interval.
1985 will time out the corresponding association and
1986 re\-associate accordingly.
2005 the rascals, sets the clock and then departs.
2040 .Bl -tag -width indent
2060 .Bl -tag -width indent
2070 This command affects the clock selection and clustering
2073 quantity of peers used to synchronize the system clock
2077 .Bl -tag -width indent
2103 The clustering algorithm repeatedly casts out outlier
2112 to the clock selection algorithm in order to produce
2114 If fewer than this number are available, the clock is
2128 in an expanding\-ring search.
2132 .Sh Reference Clock Support
2134 satellite and modem reference clocks plus a special pseudo\-clock
2135 used for backup or when no other clock source is available.
2138 .Qq Reference Clock Drivers
2145 .Qq Debugging Hints for Reference Clock Drivers
2147 .Qq How To Write a Reference Clock Driver
2154 .Qq Pulse\-per\-second (PPS) Signal Interfacing
2170 A reference clock will generally (though not always) be a radio
2177 device driver specific to each reference clock must be selected and
2181 configure a reference clock when the driver has not been compiled
2183 in a scalding remark to the system log file, but is otherwise non
2194 Reference clock addresses are of the form
2201 denoting the clock type and
2204 number in the range 0\-3.
2212 clock, where the
2215 is the clock address.
2221 options are not used for reference clock support.
2224 option is added for reference clock support, as
2229 persuade the server to cherish a reference clock with somewhat more
2243 meaning only for selected clock drivers.
2244 See the individual clock
2250 information for individual clock drivers and normally follows
2256 argument specifies the clock address.
2264 device\-dependent time offsets and four flags that can be included
2269 The stratum number of a reference clock is by default zero.
2276 specify the reference clock stratum as greater than zero.
2281 involving both a reference clock and a pulse\-per\-second (PPS)
2282 discipline signal, it is useful to specify the reference clock
2288 these options apply to all clock drivers.
2289 .Ss Reference Clock Commands
2290 .Bl -tag -width indent
2303 .Bl -tag -width indent
2305 Marks the reference clock as preferred.
2318 device\-specific fashion.
2326 for reference clock messages, as a power of 2 in seconds
2365 .Bl -tag -width indent
2368 the driver, a fixed\-point decimal number in seconds.
2371 particular clock to agree with an external standard, such as a
2374 systematic error or bias due to serial port or operating system
2380 for an individual system and driver is available, an approximate
2383 radio clock or PPS signal is supported, a special calibration
2390 .Qq Reference Clock Drivers
2396 Specifies a fixed\-point decimal number in seconds, which is
2397 interpreted in a driver\-dependent way.
2400 .Qq Reference Clock Drivers
2418 device\-specific fashion.
2427 These four flags are used for customizing the clock driver.
2430 is a function of the particular clock driver.
2447 .Bl -tag -width indent
2465 record the frequency of the local clock oscillator.
2481 in parts\-per\-million (PPM).
2488 drift file is located in, and that file system links, symbolic or
2492 a 6\-bit code.
2520 .Bl -tag -width indent
2548 Enables processing of NTP mode 7 implementation\-specific requests
2582 receives a crypto\-NAK packet that
2587 a properly forged and appropriately delivered crypto\-NAK packet
2630 receives a crypto\-NAK packet that
2635 a properly forged and appropriately delivered crypto\-NAK packet
2715 .Fl \-interface ,
2718 .Fl \-novirtualips
2719 command\-line options are specified in the configuration file,
2730 .Li https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap\-seconds.list
2732 .Li ftp://hpiers.obspm.fr/iers/bul/bulc/ntp/leap\-seconds.list .
2747 .Xr update\-leap 1update_leapmdoc
2755 .Cm \-\-enable\-leap\-smear
2762 .Sy DO NOT USE THIS OPTION ON PUBLIC\-ACCESS SERVERS!
2766 the system
2778 .Ql \- ,
2786 .Ql \-
2793 .Cm clock ,
2830 .Bd -literal
2836 and the major system events.
2839 .Bd -literal
2843 This configuration will list all clock information and
2846 peers, system events and so on is suppressed.
2849 be used instead of the default system
2867 .Bl -tag -width indent
2916 (frequency file) will be written, with a default value of 1e\-7 (0.1 PPM).
2928 or the JJY driver (type 40, mode 100 \- 180).
2932 For the JJY driver (type 40 mode 100 \- 180), the argument is
2955 The next two numbers must be between 0 and one\-half of the poll interval,
2999 .Bl -tag -width indent
3007 The default is 32 megabytes on non\-Linux machines, and \-1 under Linux.
3008 -1 means "do not lock the process into memory".
3017 Defaults to the system default.
3036 .Cm config\-from\-file
3053 .Cm saveconfig\ ntp\-%Y%m%d\-%H%M%S.conf .
3054 The filename used is stored in the system variable
3058 This command adds an additional system variable.
3069 variable will be listed as part of the default system variables
3088 the names of all system variables.
3094 holds the names of the reference clock variables.
3112 This command can be used to alter several system variables in
3130 .Bl -tag -width indent
3133 intercept, which is a parameter of the PLL/FLL clock discipline
3142 parts\-per\-million.
3147 huff\-n'\-puff filter span, which determines the most recent interval
3157 the panic sanity check is disabled and a clock offset of any value will
3169 The argument is the step threshold for the backward direction,
3177 each direction of step threshold are either
3180 As for stepback, but for the forward direction.
3193 system variables
3219 mode these values are used in\-turn in an expanding\-ring search.
3232 an expanding\-ring search.
3237 .Bl -tag
3238 .It Fl \-help
3240 .It Fl \-more\-help
3242 .It Fl \-version Op Brq Ar v|c|n
3251 \fBNTP_CONF_<option\-name>\fP or \fBNTP_CONF\fP
3257 .Bl -tag -width /etc/ntp.drift -compact
3267 Diffie\-Hellman agreement parameters
3271 .Bl -tag
3278 it to autogen\-users@lists.sourceforge.net. Thank you.
3299 Copyright (C) 1992\-2024 The University of Delaware and Network Time Foundation all rights reserved.
3317 This manual page was \fIAutoGen\fP\-erated from the \fBntp.conf\fP