r25 - 2020-11-06 - 00:52:36 - HarlanStennYou are here: NTP >  Dev Web > ReleaseTimeline
NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.

ntp-4.2.8p15 was released on 23 June 2020. It addresses 1 medium-severity security issue in ntpd, and provides 13 non-security bugfixes over 4.2.8p13.

Please see the NTP Security Notice for vulnerability and mitigation details.

Are you using Autokey in production? If so, please contact Harlan - he's got some questions for you.

NTP Release Timeline

Date ReleaseSorted ascending # of Fixes Comment
      No more releases of ntp-4.2.8 are planned, but if more are needed we will make them.
ntp-4.2.8 will go EOL when ntp-4.4.0 is released.
At that time, support for ntp-4.2.8 will be available under contract.
May '99     Initial CVS import
Jun '96     First ChangeLog comment from Harlan's autoconf conversion
Sep '07 draft-ietf-ntp-autokey-00   Initial publication of what would become RFC5906
Jul '05 draft-ietf-ntp-ntpv4-proto-00   Initial publication of what would become RFC5905
Feb '81 IEN-173   Dave publishes "Time Synchronization in DCNET Hosts", the first report on the first implementation of NTP
Feb '98 ntp-4.0.72    
Jun '98 ntp-4.0.73    
Jan '00 ntp-4.0.99    
Sep '97 ntp-4.0?   First alpha release of ntp-4
Aug '01 ntp-4.1.0   New major release. EOL for ntp-4 betas.
Move from CVS to BitKeeper.
Feb '02 ntp-4.1.1   New major release. EOL for ntp-4.1.0
Jul '03 ntp-4.1.2   New major release. EOL for ntp-4.1.1
Oct '03 ntp-4.2.0   New major release. EOL for ntp-4.1.2
Jun '06 ntp-4.2.2 >560 New major release. EOL for ntp-4.2.0
Dec '06 ntp-4.2.4 >450 New major release. EOL for ntp-4.2.2
Dec '09 ntp-4.2.6 630-1000 New major release. EOL for ntp-4.2.4
Apr '10 ntp-4.2.6p1    
Jul '10 ntp-4.2.6p2    
Jan '11 ntp-4.2.6p3    
Sep '11 ntp-4.2.6p4    
Dec '11 ntp-4.2.6p5    
Dec '14 ntp-4.2.8 >1100 New major release. EOL for ntp-4.2.6.
Support for ntp-4.2.6 available under contract.
Feb '15 ntp-4.2.8p1    
Mar '17 ntp-4.2.8p10    
Feb '18 ntp-4.2.8p11    
Aug '18 ntp-4.2.8p12    
Mar '19 ntp-4.2.8p13    
Mar '20 ntp-4.2.8p14    
Jun '20 ntp-4.2.8p15    
Apr '15 ntp-4.2.8p2    
Jun '15 ntp-4.2.8p3    
Oct '15 ntp-4.2.8p4    
Jan '16 ntp-4.2.8p5    
Jan '16 ntp-4.2.8p6    
Apr '16 ntp-4.2.8p7    
Jun '16 ntp-4.2.8p8    
Nov '16 ntp-4.2.8p9    
Jul '88 RFC1059   Publication of the NTPv1 Standard
Sep '89 RFC1119   Publication of the NTPv2 Standard
Mar '92 RFC1305   Publication of the NTPv3 Standard
Jun '10 RFC5905, RFC5906   Publication of the NTPv4 and Autokey Standards
Sep '85 RFC958   Publication of the NTP Standard Proposal
Nov '89 xntp2   Initial release?
Jun '93 xntp3   Initial release?
Oct '96 xntp3-5.86.5    
Nov '98 xntp3-5.93e.tar.gz
ntp-4.0.90
  Last release (EOL) of ntp-3
First beta release of ntp-4
Jun '94 xntp3.3wy    
Apr '96 xntp3.5f   Dave's last solo NTPv3 release
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