-
Notifications
You must be signed in to change notification settings - Fork 43
/
NEWS
1052 lines (902 loc) · 39.4 KB
/
NEWS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
New in version 4.6.1
====================
Enhancements
------------
* Add ntsaeads directive to enable only selected AEAD algorithms for NTS
Workarounds
-----------
* Negotiate use of compliant NTS keys with AES-128-GCM-SIV AEAD algorithm
(by default the keys are generated differently than in RFC 8915 for
compatibility with chrony server and client versions 4.4, 4.5, and 4.6)
* Switch to compliant NTS keys if first response from server is NTS NAK
New in version 4.6
==================
Enhancements
------------
* Add activate option to local directive to set activation threshold
* Add ipv4 and ipv6 options to server/pool/peer directive
* Add kod option to ratelimit directive for server KoD RATE support
* Add leapseclist directive to read NIST/IERS leap-seconds.list file
* Add ptpdomain directive to set PTP domain for NTP over PTP
* Allow disabling pidfile
* Improve copy server option to accept unsynchronised status instantly
* Log one selection failure on start
* Add offset command to modify source offset correction
* Add timestamp sources to ntpdata report
Bug fixes
---------
* Fix crash on sources reload during initstepslew or RTC initialisation
* Fix source refreshment to not repeat failed name resolving attempts
New in version 4.5
==================
Enhancements
------------
* Add support for AES-GCM-SIV in GnuTLS
* Add support for corrections from PTP transparent clocks
* Add support for systemd socket activation
Bug fixes
---------
* Fix presend in interleaved mode
* Fix reloading of modified sources from sourcedir
New in version 4.4
==================
Enhancements
------------
* Add support for AES-GCM-SIV with Nettle >= 3.9 to shorten NTS
cookies to avoid some length-specific blocking of NTP on Internet
* Add support for multiple refclocks using extpps option on one PHC
* Add maxpoll option to hwtimestamp directive to improve PHC tracking
with low packet rates
* Add hwtstimeout directive to configure timeout for late timestamps
* Handle late hardware transmit timestamps of NTP requests on all sockets
* Handle mismatched 32/64-bit time_t in SOCK refclock samples
* Improve source replacement
* Log important changes made by command requests (chronyc)
* Refresh address of NTP sources periodically
* Request nanosecond kernel RX timestamping on FreeBSD
* Set DSCP for IPv6 packets
* Shorten NTS-KE retry interval when network is down
* Update seccomp filter for musl
* Warn if loading keys from file with unexpected permissions
* Warn if source selection fails or falseticker is detected
* Add selectopts command to modify source-specific selection options
* Add timestamp sources to serverstats report and make its fields 64-bit
* Add -e option to chronyc to indicate end of response
New in version 4.3
==================
Enhancements
------------
* Add local option to refclock directive to stabilise system clock
with more stable free-running clock (e.g. TCXO, OCXO)
* Add maxdelayquant option to server/pool/peer directive to replace
maxdelaydevratio filter with long-term quantile-based filtering
* Add selection option to log directive
* Allow external PPS in PHC refclock without configurable pin
* Don't accept first interleaved response to minimise error in delay
* Don't use arc4random on Linux to avoid server performance loss
* Improve filter option to better handle missing NTP samples
* Improve stability with hardware timestamping and PHC refclock
* Update seccomp filter
Bug fixes
---------
* Fix waitsync command to reconnect when not getting response
New in version 4.2
==================
Enhancements
------------
* Add support for NTPv4 extension field improving synchronisation
stability and resolution of root delay and dispersion (experimental)
* Add support for NTP over PTP (experimental)
* Add support for AES-CMAC and hash functions in GnuTLS
* Improve server interleaved mode to be more reliable and support
multiple clients behind NAT
* Update seccomp filter
* Add statistics about interleaved mode to serverstats report
Bug fixes
---------
* Fix RTC support with 64-bit time_t on 32-bit Linux
* Fix seccomp filter to work correctly with bind*device directives
* Suppress kernel adjustments of system clock (dosynctodr) on illumos
Other changes
-------------
* Switch Solaris support to illumos
New in version 4.1
==================
Enhancements
------------
* Add support for NTS servers specified by IP address (matching
Subject Alternative Name in server certificate)
* Add source-specific configuration of trusted certificates
* Allow multiple files and directories with trusted certificates
* Allow multiple pairs of server keys and certificates
* Add copy option to server/pool directive
* Increase PPS lock limit to 40% of pulse interval
* Perform source selection immediately after loading dump files
* Reload dump files for addresses negotiated by NTS-KE server
* Update seccomp filter and add less restrictive level
* Restart ongoing name resolution on online command
Bug fixes
---------
* Fix responding to IPv4 command requests on FreeBSD
* Fix dump files to not include uncorrected offset
* Fix initstepslew to accept time from own NTP clients
* Reset NTP address and port when no longer negotiated by NTS-KE server
New in version 4.0
==================
Enhancements
------------
* Add support for Network Time Security (NTS) authentication
* Add support for AES-CMAC keys (AES128, AES256) with Nettle
* Add authselectmode directive to control selection of unauthenticated sources
* Add binddevice, bindacqdevice, bindcmddevice directives
* Add confdir directive to better support fragmented configuration
* Add sourcedir directive and "reload sources" command to support dynamic
NTP sources specified in files
* Add clockprecision directive
* Add dscp directive to set Differentiated Services Code Point (DSCP)
* Add -L option to limit log messages by severity
* Add -p option to print whole configuration with included files
* Add -U option to allow start under non-root user
* Allow maxsamples to be set to 1 for faster update with -q/-Q option
* Avoid replacing NTP sources with sources that have unreachable address
* Improve pools to repeat name resolution to get "maxsources" sources
* Improve source selection with trusted sources
* Improve NTP loop test to prevent synchronisation to itself
* Repeat iburst when NTP source is switched from offline state to online
* Update clock synchronisation status and leap status more frequently
* Update seccomp filter
* Add "add pool" command
* Add "reset sources" command to drop all measurements
* Add authdata command to print details about NTP authentication
* Add selectdata command to print details about source selection
* Add -N option and sourcename command to print original names of sources
* Add -a option to some commands to print also unresolved sources
* Add -k, -p, -r options to clients command to select, limit, reset data
Bug fixes
---------
* Don't set interface for NTP responses to allow asymmetric routing
* Handle RTCs that don't support interrupts
* Respond to command requests with correct address on multihomed hosts
Removed features
----------------
* Drop support for RIPEMD keys (RMD128, RMD160, RMD256, RMD320)
* Drop support for long (non-standard) MACs in NTPv4 packets (chrony 2.x
clients using non-MD5/SHA1 keys need to use option "version 3")
* Drop support for line editing with GNU Readline
New in version 3.5.1
====================
Security fixes
--------------
* Create new file when writing pidfile (CVE-2020-14367)
New in version 3.5
==================
Enhancements
------------
* Add support for more accurate reading of PHC on Linux 5.0
* Add support for hardware timestamping on interfaces with read-only
timestamping configuration
* Add support for memory locking and real-time priority on FreeBSD,
NetBSD, Solaris
* Update seccomp filter to work on more architectures
* Validate refclock driver options
Bug fixes
---------
* Fix bindaddress directive on FreeBSD
* Fix transposition of hardware RX timestamp on Linux 4.13 and later
* Fix building on non-glibc systems
New in version 3.4
==================
Enhancements
------------
* Add filter option to server/pool/peer directive
* Add minsamples and maxsamples options to hwtimestamp directive
* Add support for faster frequency adjustments in Linux 4.19
* Change default pidfile to /var/run/chrony/chronyd.pid to allow
chronyd without root privileges to remove it on exit
* Disable sub-second polling intervals for distant NTP sources
* Extend range of supported sub-second polling intervals
* Get/set IPv4 destination/source address of NTP packets on FreeBSD
* Make burst options and command useful with short polling intervals
* Modify auto_offline option to activate when sending request failed
* Respond from interface that received NTP request if possible
* Add onoffline command to switch between online and offline state
according to current system network configuration
* Improve example NetworkManager dispatcher script
Bug fixes
---------
* Avoid waiting in Linux getrandom system call
* Fix PPS support on FreeBSD and NetBSD
New in version 3.3
==================
Enhancements
------------
* Add burst option to server/pool directive
* Add stratum and tai options to refclock directive
* Add support for Nettle crypto library
* Add workaround for missing kernel receive timestamps on Linux
* Wait for late hardware transmit timestamps
* Improve source selection with unreachable sources
* Improve protection against replay attacks on symmetric mode
* Allow PHC refclock to use socket in /var/run/chrony
* Add shutdown command to stop chronyd
* Simplify format of response to manual list command
* Improve handling of unknown responses in chronyc
Bug fixes
---------
* Respond to NTPv1 client requests with zero mode
* Fix -x option to not require CAP_SYS_TIME under non-root user
* Fix acquisitionport directive to work with privilege separation
* Fix handling of socket errors on Linux to avoid high CPU usage
* Fix chronyc to not get stuck in infinite loop after clock step
New in version 3.2
==================
Enhancements
------------
* Improve stability with NTP sources and reference clocks
* Improve stability with hardware timestamping
* Improve support for NTP interleaved modes
* Control frequency of system clock on macOS 10.13 and later
* Set TAI-UTC offset of system clock with leapsectz directive
* Minimise data in client requests to improve privacy
* Allow transmit-only hardware timestamping
* Add support for new timestamping options introduced in Linux 4.13
* Add root delay, root dispersion and maximum error to tracking log
* Add mindelay and asymmetry options to server/peer/pool directive
* Add extpps option to PHC refclock to timestamp external PPS signal
* Add pps option to refclock directive to treat any refclock as PPS
* Add width option to refclock directive to filter wrong pulse edges
* Add rxfilter option to hwtimestamp directive
* Add -x option to disable control of system clock
* Add -l option to log to specified file instead of syslog
* Allow multiple command-line options to be specified together
* Allow starting without root privileges with -Q option
* Update seccomp filter for new glibc versions
* Dump history on exit by default with dumpdir directive
* Use hardening compiler options by default
Bug fixes
---------
* Don't drop PHC samples with low-resolution system clock
* Ignore outliers in PHC tracking, RTC tracking, manual input
* Increase polling interval when peer is not responding
* Exit with error message when include directive fails
* Don't allow slash after hostname in allow/deny directive/command
* Try to connect to all addresses in chronyc before giving up
New in version 3.1
==================
Enhancements
------------
* Add support for precise cross timestamping of PHC on Linux
* Add minpoll, precision, nocrossts options to hwtimestamp directive
* Add rawmeasurements option to log directive and modify measurements
option to log only valid measurements from synchronised sources
* Allow sub-second polling interval with NTP sources
Bug fixes
---------
* Fix time smoothing in interleaved mode
New in version 3.0
==================
Enhancements
------------
* Add support for software and hardware timestamping on Linux
* Add support for client/server and symmetric interleaved modes
* Add support for MS-SNTP authentication in Samba
* Add support for truncated MACs in NTPv4 packets
* Estimate and correct for asymmetric network jitter
* Increase default minsamples and polltarget to improve stability
with very low jitter
* Add maxjitter directive to limit source selection by jitter
* Add offset option to server/pool/peer directive
* Add maxlockage option to refclock directive
* Add -t option to chronyd to exit after specified time
* Add partial protection against replay attacks on symmetric mode
* Don't reset polling interval when switching sources to online state
* Allow rate limiting with very short intervals
* Improve maximum server throughput on Linux and NetBSD
* Remove dump files after start
* Add tab-completion to chronyc with libedit/readline
* Add ntpdata command to print details about NTP measurements
* Allow all source options to be set in add server/peer command
* Indicate truncated addresses/hostnames in chronyc output
* Print reference IDs as hexadecimal numbers to avoid confusion with
IPv4 addresses
Bug fixes
---------
* Fix crash with disabled asynchronous name resolving
New in version 2.4.1
====================
Bug fixes
---------
* Fix processing of kernel timestamps on non-Linux systems
* Fix crash with smoothtime directive
* Fix validation of refclock sample times
* Fix parsing of refclock directive
New in version 2.4
==================
Enhancements
------------
* Add orphan option to local directive for orphan mode compatible with ntpd
* Add distance option to local directive to set activation threshold
(1 second by default)
* Add maxdrift directive to set maximum allowed drift of system clock
* Try to replace NTP sources exceeding maximum distance
* Randomise source replacement to avoid getting stuck with bad sources
* Randomise selection of sources from pools on start
* Ignore reference timestamp as ntpd doesn't always set it correctly
* Modify tracking report to use same values as seen by NTP clients
* Add -c option to chronyc to write reports in CSV format
* Provide detailed manual pages
Bug fixes
---------
* Fix SOCK refclock to work correctly when not specified as last refclock
* Fix initstepslew and -q/-Q options to accept time from own NTP clients
* Fix authentication with keys using 512-bit hash functions
* Fix crash on exit when multiple signals are received
* Fix conversion of very small floating-point numbers in command packets
Removed features
----------------
* Drop documentation in Texinfo format
New in version 2.3
==================
Enhancements
------------
* Add support for NTP and command response rate limiting
* Add support for dropping root privileges on Mac OS X, FreeBSD, Solaris
* Add require and trust options for source selection
* Enable logchange by default (1 second threshold)
* Set RTC on Mac OS X with rtcsync directive
* Allow binding to NTP port after dropping root privileges on NetBSD
* Drop CAP_NET_BIND_SERVICE capability on Linux when NTP port is disabled
* Resolve names in separate process when seccomp filter is enabled
* Replace old records in client log when memory limit is reached
* Don't reveal local time and synchronisation state in client packets
* Don't keep client sockets open for longer than necessary
* Ignore poll in KoD RATE packets as ntpd doesn't always set it correctly
* Warn when using keys shorter than 80 bits
* Add keygen command to generate random keys easily
* Add serverstats command to report NTP and command packet statistics
Bug fixes
---------
* Fix clock correction after making step on Mac OS X
* Fix building on Solaris
New in version 2.2.1
====================
Security fixes
--------------
* Restrict authentication of NTP server/peer to specified key (CVE-2016-1567)
New in version 2.2
==================
Enhancements
------------
* Add support for configuration and monitoring over Unix domain socket
(accessible by root or chrony user when root privileges are dropped)
* Add support for system call filtering with seccomp on Linux (experimental)
* Add support for dropping root privileges on NetBSD
* Control frequency of system clock on FreeBSD, NetBSD, Solaris
* Add system leap second handling mode on FreeBSD, NetBSD, Solaris
* Add dynamic drift removal on Mac OS X
* Add support for setting real-time priority on Mac OS X
* Add maxdistance directive to limit source selection by root distance
(3 seconds by default)
* Add refresh command to get new addresses of NTP sources
* Allow wildcard patterns in include directive
* Restore time from driftfile with -s option if later than RTC time
* Add configure option to set default hwclockfile
* Add -d option to chronyc to enable debug messages
* Allow multiple addresses to be specified for chronyc with -h option
and reconnect when no valid reply is received
* Make check interval in waitsync command configurable
Bug fixes
---------
* Fix building on NetBSD, Solaris
* Restore time from driftfile with -s option if reading RTC failed
Removed features
----------------
* Drop support for authentication with command key (run-time configuration
is now allowed only for local users that can access the Unix domain socket)
New in version 2.1.1
====================
Bug fixes
---------
* Fix clock stepping by integer number of seconds on Linux
New in version 2.1
==================
Enhancements
------------
* Add support for Mac OS X
* Try to replace unreachable and falseticker servers/peers specified
by name like pool sources
* Add leaponly option to smoothtime directive to allow synchronised
leap smear between multiple servers
* Use specific reference ID when smoothing served time
* Add smoothing command to report time smoothing status
* Add smoothtime command to activate or reset time smoothing
Bug fixes
---------
* Fix crash in source selection with preferred sources
* Fix resetting of time smoothing
* Include packet precision in peer dispersion
* Fix crash in chronyc on invalid command syntax
New in version 2.0
==================
Enhancements
------------
* Update to NTP version 4 (RFC 5905)
* Add pool directive to specify pool of NTP servers
* Add leapsecmode directive to select how to correct clock for leap second
* Add smoothtime directive to smooth served time and enable leap smear
* Add minsources directive to set required number of selectable sources
* Add minsamples and maxsamples options for all sources
* Add tempcomp configuration with list of points
* Allow unlimited number of NTP sources, refclocks and keys
* Allow unreachable sources to remain selected
* Improve source selection
* Handle offline sources as unreachable
* Open NTP server port only when necessary (client access is allowed by
allow directive/command or peer/broadcast is configured)
* Change default bindcmdaddress to loopback address
* Change default maxdelay to 3 seconds
* Change default stratumweight to 0.001
* Update adjtimex synchronisation status
* Use system headers for adjtimex
* Check for memory allocation errors
* Reduce memory usage
* Add configure options to compile without NTP, cmdmon, refclock support
* Extend makestep command to set automatic clock stepping
Bug fixes
---------
* Add sanity checks for time and frequency offset
* Don't report synchronised status during leap second
* Don't combine reference clocks with close NTP sources
* Fix accepting requests from configured sources
* Fix initial fallback drift setting
New in version 1.31.1
=====================
Security fixes
--------------
* Protect authenticated symmetric NTP associations against DoS attacks
(CVE-2015-1853)
* Fix access configuration with subnet size indivisible by 4 (CVE-2015-1821)
* Fix initialization of reply slots for authenticated commands (CVE-2015-1822)
New in version 1.31
===================
Enhancements
------------
* Support operation in other NTP eras (next era begins in 2036),
NTP time is mapped to [-50, +86] years around build date by default
* Restore time from driftfile with -s when RTC is missing/unsupported
* Close connected client sockets when not waiting for reply
* Use one client socket with random port when acquisitionport is 0
* Use NTP packets instead of UDP echo for presend
* Don't adjust polling interval when sending fails
* Allow binding to addresses that don't exist yet
* Ignore measurements around leap second
* Improve detection of unexpected time jumps
* Include example of logrotate configuration, systemd services and
NetworkManager dispatcher script
Bug fixes
---------
* Reconnect client sockets for each request to follow changes
in network configuration automatically
* Restart timer when polling interval is changed on reset
New in version 1.30
===================
Enhancements
------------
* Add asynchronous name resolving with POSIX threads
* Add PTP hardware clock (PHC) refclock driver
* Add new generic clock driver to slew by adjusting frequency only
(without kernel PLL or adjtime) and use it on Linux
* Add rtcautotrim directive to trim RTC automatically
* Add hwclockfile directive to share RTC LOCAL/UTC setting with hwclock
* Add maxslewrate directive to set maximum allowed slew rate
* Add maxdispersion option for refclocks
* Add -q/-Q options to set clock/print offset once and exit
* Allow directives to be specified on chronyd command line
* Replace frequency scaling in Linux driver with retaining of tick
* Try to detect unexpected forward time jumps and reset state
* Exit with non-zero code when maxchange limit is reached
* Improve makestep to not start and stop slew unnecessarily
* Change default corrtimeratio to 3.0 to improve frequency accuracy
* Announce leap second only on last day of June and December
* Use separate connected client sockets for each NTP server
* Remove separate NTP implementation used for initstepslew
* Limit maximum minpoll set by KoD RATE to default maxpoll
* Don't send NTP requests with unknown key
* Print warning when source is added with unknown key
* Take leap second in PPS refclock from locked source
* Make reading of RTC for initial trim more reliable
* Don't create cmdmon sockets when cmdport is 0
* Add configure option to set default user to drop root privileges
* Add configure option to compile with debug messages
* Print debug messages when -d is used more than once
* Change format of messages written to terminal with -d
* Write fatal messages also to stderr with -n
* Use IP_RECVERR socket option in chronyc to not wait unnecessarily
* Shorten default chronyc timeout for localhost
* Change default hostname in chronyc from localhost to 127.0.0.1
* Print error message on invalid syntax with all chronyc commands
* Include simulation test suite using clknetsim
Bug fixes
---------
* Fix crash when selecting with multiple preferred sources
* Fix frequency calculation with large frequency offsets
* Fix code writing drift and RTC files to compile correctly
* Fix -4/-6 options in chronyc to not reset hostname set by -h
* Fix refclock sample validation with sub-second polling interval
* Set stratum correctly with non-PPS SOCK refclock and local stratum
* Modify dispersion accounting in refclocks to prevent PPS getting
stuck with large dispersion and not accepting new samples
New in version 1.29.1
=====================
Security fixes
--------------
* Modify chronyc protocol to prevent amplification attacks (CVE-2014-0021)
(incompatible with previous protocol version, chronyc supports both)
New in version 1.29
===================
Security fixes
--------------
* Fix crash when processing crafted commands (CVE-2012-4502)
(possible with IP addresses allowed by cmdallow and localhost)
* Don't send uninitialized data in SUBNETS_ACCESSED and CLIENT_ACCESSES
replies (CVE-2012-4503) (not used by chronyc)
Other changes
-------------
* Drop support for SUBNETS_ACCESSED and CLIENT_ACCESSES commands
New in version 1.28
===================
* Combine sources to improve accuracy
* Make config and command parser strict
* Add -a option to chronyc to authenticate automatically
* Add -R option to ignore initstepslew and makestep directives
* Add generatecommandkey, minsamples, maxsamples and user directives
* Improve compatibility with NTPv1 and NTPv2 clients
* Create sockets only in selected family with -4/-6 option
* Treat address bind errors as non-fatal
* Extend tracking log
* Accept float values as initstepslew threshold
* Allow hostnames in offline, online and burst commands
* Fix and improve peer polling
* Fix crash in config parsing with too many servers
* Fix crash with duplicated initstepslew address
* Fix delta calculation with extreme frequency offsets
* Set local stratum correctly
* Remove unnecessary adjtimex calls
* Set paths in documentation by configure
* Update chrony.spec
New in version 1.27
===================
* Support for stronger keys via NSS or libtomcrypt library
* Support reading leap second data from tz database
* Support for precise clock stepping on Linux
* Support for nanoseconds in SHM refclock
* Make offset corrections smoother on Linux
* Make transmit timestamps random below clock precision
* Add corrtimeratio and maxchange directives
* Extend tracking, sources and activity reports
* Wait in foreground process until daemon is fully initialized
* Fix crash with slow name resolving
* Fix iburst with jittery sources
* Fix offset stored in rtc data right after trimrtc
* Fix crash and hang with RTC or manual samples
* Don't use readonly adjtime on Linux kernels before 2.6.28
* Changed chronyc protocol, incompatible with older versions
New in version 1.26
===================
* Add compatibility with Linux 3.0 and later
* Use proper source address in NTP replies on multihomed IPv6 hosts
* Accept NTP packets with versions 4, 3 and 2
* Cope with unexpected backward time jumps
* Don't reset kernel frequency on start without drift file
* Retry on permanent DNS error by default
* Add waitsync command
New in version 1.25
===================
* Improve accuracy with NTP sources
* Improve accuracy with reference clocks
* Improve polling interval adjustment
* Improve stability with temporary asymmetric delays
* Improve source selection
* Improve initial synchronisation
* Add delayed server name resolving
* Add temperature compensation
* Add nanosecond slewing to Linux driver
* Add fallback drifts
* Add iburst, minstratum, maxdelaydevratio, polltarget,
prefer, noselect options
* Add rtcsync directive to enable Linux 11-minute mode
* Add reselectdist, stratumweight, logbanner, maxclockerror,
include directives
* Add -n option to not detach daemon from terminal
* Fix pidfile directive
* Fix name resolving with disabled IPv6 support
* Fix reloading sample histories with reference clocks
* Fix crash with auto_offline option
* Fix online command on auto_offline sources
* Fix file descriptor leaks
* Increase burst polling interval and stop on KoD RATE
* Set maxupdateskew to 1000 ppm by default
* Require password for clients command
* Update drift file at most once per hour
* Use system headers for Linux RTC support
* Reduce default chronyc timeout and make it configurable
* Avoid large values in chronyc sources and sourcestats output
* Add reselect command to force reselecting best source
* Add -m option to allow multiple commands on command line
New in version 1.24
===================
Security fixes
--------------
* Don't reply to invalid cmdmon packets (CVE-2010-0292)
* Limit client log memory size (CVE-2010-0293)
* Limit rate of syslog messages (CVE-2010-0294)
Bug fixes/Enhancements
----------------------
* Support for reference clocks (SHM, SOCK, PPS drivers)
* IPv6 support
* Linux capabilities support (to drop root privileges)
* Memory locking support on Linux
* Real-time scheduler support on Linux
* Leap second support on Linux
* Support for editline library
* Support for new Linux readonly adjtime
* NTP client support for KoD RATE
* Read kernel timestamps for received NTP packets
* Reply to NTP requests with correct address on multihomed hosts
* Retry name resolving after temporary failure
* Fix makestep command, make it available on all systems
* Add makestep directive for automatic clock stepping
* Don't require _bigadj kernel symbol on NetBSD
* Avoid blocking read in Linux RTC driver
* Support for Linux on S/390 and PowerPC
* Fix various bugs on 64-bit systems
* Fix valgrind errors and compiler warnings
* Improve configure to support common options and variables
* Improve status checking and printing in chronyc
* Return non-zero exit code on errors in chronyc
* Reduce request timeout in chronyc
* Print estimated offset in sourcestats
* Changed chronyc protocol, incompatible with older versions
New in version 1.23
===================
* Support for MIPS, x86_64, sparc, alpha, arm, FreeBSD
* Fix serious sign-extension error in handling IP addresses
* RTC support can be excluded at compile time
* Make sources gcc-4 compatible
* Fix various compiler warnings
* Handle fluctuations in peer distance better.
* Fixed handling of stratum zero.
* Fix various problems for 64-bit systems
* Flush chronyc output streams after each command, to allow it to be driven
through pipes
* Manpage improvements
Version 1.22
============
This release number was claimed by a release that Mandriva made to patch
important bugs in 1.21. The official numbering has jumped to 1.23 as a
consequence.
New in version 1.21
===================
* Don't include Linux kernel header files any longer : allows chrony to compile
on recent distros.
* Stop trying to use RTC if continuous streams of error messages would occur
(Linux with HPET).
New in version 1.20
===================
* Many small tidy-ups and security improvements
* Improve documentation (RTC support in post 2.0 kernels)
* Remove trailing \n from syslog messages
* Syslog messages now include IP and port number when packet cannot be sent.
* Added the "acquisitionport" directive. (Kalle Olavi Niemitalo)
* Use uname(2) instead of /proc/version to get kernel version.
* Merge support for Linux on Alpha
* Merge support for 64bit architectures
* Don't link -lm if it's not needed
* Fix Solaris build (broken by 64bit change)
* Add detection of Linux 2.5
* Allow arbitrary value of HZ in Linux kernel
* Fix for chrony.spec on SuSE (Paul Elliot)
* Fix handling of initstepslew if no servers are listed (John Hasler)
* Fix install rule in Makefile if chronyd is in use (Juliusz Chroboczek)
* Replace sprintf by snprintf to remove risk of buffer overrun (John Hasler)
* Add --help to configure script
New in version 1.19
===================
* Auto-detect kernel's timer interrupt rate (so-called 'HZ') when chronyd
starts instead of relying on compiled-in value.
* Fix 2 bugs in function that creates the directory for the log and dump files.
* Amended webpage URL and contact details.
* Generate more informative syslog messages before exiting on failed
assertions.
* Fix bugs in clamping code for the tick value used when slewing a large
offset.
* Don't chown files to root during install (should be pointless, and makes RPM
building awkward as ordinary user.)
* Include chrony.spec file for building RPMs
New in version 1.18
===================
* Amend homepage and mailing list information to chrony.sunsite.dk
* Delete pidfile on exit from chronyd.
* Improvements to readline interface to chronyc
* Only generate syslog message when synchronisation is initially lost (instead
of on every failed synchronisation attempt)
* Use double fork approach when initialising daemon.
* More things in contrib directory.
* New options to help package builders: --infodir/--mandir for configure, and
DESTDIR=xxx for make. (See section 2.2 of chrony.txt for details).
* Changed the wording of the messages generated by mailonchange and logchange
directives.
New in version 1.17
===================
* Port to NetBSD
* Configuration supports Linux on PPC
* Fix compilation warnings
* Several documentation improvements
* Bundled manpages (taken from the 'missing manpages project')
* Cope with lack of bzero function for Solaris 2.3 systems
* Store chronyd's pid in a file (default /var/run/chronyd.pid) and check if
chronyd may already be running when starting up. New pidfile directive in
configuration file.
* Any size subnet is now allowed in allow and deny commands. (Example:
6.7.8/20 or 6.7.8.x/20 (any x) mean a 20 bit subnet).
* The environment variables CC and CFLAGS passed to configure can now be used
to select the compiler and optimisation/debug options to use
* Write syslog messages when chronyd loses synchronisation.
* Print GPL text when chronyc is run.
* Add NTP broadcast server capability (new broadcast directive).
* Add 'auto_offline' option to server/peer (conf file) or add server/peer (via
chronyc).
* Add 'activity' command to chronyc, to report how many servers/peers are
currently online/offline.
* Fix long-standing bug with how the system time quantum was calculated.
* Include support for systems with HZ!=100 (HZ is the timer interrupt
frequency).
* Include example chrony.conf and chrony.keys files (examples subdirectory).
* Include support for readline in chronyc.
New in version 1.16.1
=====================
* Fix compilation problem on Linux 2.4.13 (spinlock.h / spinlock_t)
New in version 1.16
===================
* More informative captions for 'sources' and 'sourcestats' commands in chronyc
(use 'sources -v' and 'sourcestats -v' to get them).
* Correct behaviour for Solaris versions>=2.6 (dosynctodr not required on these
versions.)
* Remove some compiler warnings (Solaris)
* If last line of keys file doesn't have end-of-line, don't truncate final
character of that key.
* Change timestamp format used in logfiles to make it fully numeric (to aid
importing data into spreadsheets etc)
* Minor documentation updates and improvements.
New in version 1.15
===================
* Add contributed change to 'configure' to support Solaris 2.8 on x86
* Workaround for assertion failure that arises if two received packets occur
close together. (Still need to find out why this happens at all.)
* Hopefully fix problem where fast slewing was incompatible with machines
that have a large background drift rate (=> tick value went out of range
for adjtimex() on Linux.)
* Fix rtc_linux.c compile problems with 2.4.x kernel include files.
* Include support for RTC device not being at /dev/rtc (new rtcdevice directive
in configuration file).
* Include support for restricting network interfaces for commands (new
bindcmdaddress directive in configuration file)
* Fix potential linking fault in pktlength.c (use of CROAK macro replaced by
normal assert).
* Add some material on bug reporting + contributing to the chrony.texi file
* Made the chrony.texi file "Vim6-friendly" (removed xrefs on @node lines,
added folding markers to chapters + sections.)
* Switched over to GPL for the licence
New in version 1.14
===================
* Fix compilation for certain other Linux distributions (including Mandrake
7.1)
New in version 1.13
===================
* Fixed compilation problems on Redhat/SuSE installations with recent 2.2.x
kernels.
* Minor tidy-ups and documentation enhancements.
* Add support for Linux 2.4 kernels
New in version 1.12
===================
* Trial fix for long-standing bug in Linux RTC estimator when system time is
slewed.
* Fix bug in chronyc if -h is specified without a hostname
* Fixes to logging various error conditions when operating in daemon mode.
* More stuff under contrib/
* Changes to README file (e.g. about the new chrony-users mailing list)
New in version 1.11a
====================
* Minor changes to contact details
* Minor changes to installation details (chrony subdirectory under doc/)
New in version 1.11
===================
* Improve robustness of installation procedure
* Tidy up documenation and contact details
* Distribute manual as .txt rather than as .ps
* Add -n option to chronyc to work with numeric IP addresses rather than
names.
* Add material in contrib subdirectory
* Improve robustness of handling drift file and RTC coefficients file
* Improve robustness of regression algorithm
New in version 1.1
==================
Bug fixes
---------
* Made linear regression more resistant to rounding errors (old one
occasionally generated negative variances which made everything go
haywire). Trap infinite or 'not-a-number' values being used to
alter system clock to increase robustness further.
Other changes/Enhancements
--------------------------
* Support for Linux 2.1 and 2.2 kernels
* New command 'makestep' in chronyc to immediately jump the system
time to match the NTP estimated time (Linux only) - a response to
systems booting an hour wrong after summertime/wintertime changes,
due to RTCs running on local time. Needs extending to Sun driver
files too.
* New directives 'logchange' and 'mailonchange' to log to syslog or
email to a specific address respectively if chronyd detects a clock
offset exceeding a defined threshold.
* Added capability to log all client/peer NTP accesses and command
accesses (can be turned off with conf file directive 'noclientlog').
Added 'clients' command to chronyc to display this data.
* Improved manual mode to use robust regression rather than 2 point
fit.
* Added 'manual list' and 'manual delete' commands to chronyc to
allow display of entered timestamps and discretionary deletion of
outliers.
* If host goes unsynchronised the dummy IP address 0.0.0.0 is detected
to avoid attempting a reverse name lookup (to stop dial on demand IP
links from being started)
* Changed chronyc/chronyd protocol so messages are now all variable
length. Saves on network bandwidth particularly for large replies
from chronyd to chronyc (to support the clients command).
* Added bindaddress directive to configuration file, to give
additional control over limiting which hosts can access the local
server.
* Groundwork done for a port to Windows NT to compile with Cygwin
toolkit. chronyc works (to monitor another host). sys_winnt.c
needs finishing to use NT clock control API. Program structure
needs adapting to use Windows NT service functions, so it can be
started at boot time. Hopefully a Windows NT / Cygwin guru with
some spare time can take this port over :-)
New in version 1.02
===================
Bug fixes
---------
* Fix error messages in chronyc if daemon is not reachable.