r10 - 2007-12-21 - 14:56:47 - SteveKosteckeYou are here: NTP >  Dev Web > SourceCodeManagement
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.

Source Code Management


The NTP Project used no source code management for many years.

Eventually, we started using CVS, and that worked well for a while.

After a while, the limitations of CVS started driving Harlan crazy, and since he is the driver of the beast, he looked for a replacment. After about 2 more YEARS of study and looking, he chose BitKeeper and has been very happy with it ever since.

In early 2005, it was announced that BitMover would be stopping its free use license for BitKeeper.

While we are looking to continue on using the commercial version of BitKeeper, people have been asking about evaluating a replacement for BitKeeper.


  • The SCM must be invisible to Dave Mills
  • its use must not require any signature from anybody at UDel for its use there
  • it must support file and directory renames
  • it must support tracking of file/directory permission attribute changes
  • it should support checkins for work-in-progress
  • it must support the functionality we have with the existing triggers, described in the BitKeeper/triggers/trigger.cfg file of any ntp-dev or ntp-stable repo, which execute the following scripts:
    • BitKeeper/triggers/notify (used for debugging)
    • BitKeeper/triggers/paranoid (used for security)
    • BitKeeper/triggers/commitlogs (commit log email)
    • BitKeeper/triggers/2mirrors (updates repository mirrors)
    • BitKeeper/triggers/send (changeset email)
  • it must easily support ntp-stable and ntp-dev repositories, and pulling changesets from ntp-stable to ntp-dev, and should support pulling changesets from ntp-dev to ntp-stable
  • it must support integration areas
  • it must be robust, reliable, and easy to use
  • it must not be a pig
  • it must have useful merge support
  • it must have useful branch/LOD support
  • it must have an easy/useful way to find when changes were made
  • it must have a useful web interface

There are probably more, but this is the list off the top of my head. Oh, please also see MaintainerIssues#How_to_work_on_a_bug for how I like to handle dealing with patches and things.

SCM Matrix

What URL Notes
bitkeeper http://www.bitmover.com Harlan likes this best
darcs http://darcs.net/ Seems "young" to Harlan
SVN http://www.subversion.org  
perforce http://www.perforce.com Do we need a UDel signature for its use at UDel?
gnu-arch http://www.gnuarch.org Funky file names? Windows?

Comparisons and References


If you would prefer to add your comment below instead of editing the table above, please do so. You can also email your comments to webmaster@ntp.org .

  • One of the major gripes with P4 amoungst the FreeBSD userbase is the utter lack of decent support for anonymous r/o checkouts. In this respect, switching to perforce would make "public" access to ntp's development source much worse than it is now. -- TWikiGuest - 06 Dec 2005 15:27:22

Here's my first pass...

Please comment below or edit above, as appropriate.

-- HarlanStenn - 09 May 2005

Edit | WYSIWYG | Attach | Printable | Raw View | Backlinks: Web, All Webs | History: r12 < r11 < r10 < r9 < r8 | More topic actions...
SSL security by CAcert
Get the CAcert Root Certificate
This site is powered by the TWiki collaboration platform
IPv6 Ready
Copyright & 1999-2022 by the contributing authors. All material on this collaboration platform is the property of the contributing authors. Ideas, requests, problems regarding the site? Send feedback