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.

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

Jupiter Refclocks - Development

Development issues concerning Jupiter Refclocks. See ConfiguringJupiterRefclocks for documentaion.

hardpps

Editing the code to change hardpps is lame. Why not do it like refclock_atom.c or refclock_nmea.c, for example?

-- HarlanStenn - 07 Sep 2004

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--enable-jupiter

The jupiter refclock is alleged to require:

• inline
• struct timespec
• timepps.h or sys/timepps.h

Which of these does linux not provide, yet the jupiter refclock will work without it?

-- HarlanStenn - 07 Sep 2004

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With ntp-stable-4.2.0a-20040617

checking for inline... inline
...
checking for struct timespec... yes
...
checking timepps.h usability... no
checking timepps.h presence... no
checking for timepps.h... no
checking sys/timepps.h usability... yes
checking sys/timepps.h presence... yes
checking for sys/timepps.h... yes

I do not quite understand what you mean. Seems that at least 2.4.21-NANO supplies all three.

-- BjornGabrielsson - 05 Oct 2004

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OK, then why does ConfiguringJupiterRefclocks say that the jupiter refclock does not build on linux by default?

If the above condition is met, it will be.

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On my Linux 2.4.20 with PPSkit patch on a Redhat 9 system the JUPITER refclock compiles in ntp-4.2.0 by default.

Attached is a patch for refclock_jupiter.c to enable hardpps using flag4 ie adding 'flag4 1' to the server line will enable hardpps

• jupiter.c.patch: patch for ntp-4.2.0 refclock_jupiter.c for hardpps

-- IanC - 06 Mar 2005

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Please use http://bugzilla.ntp.org and "attach" patches there - one cannot tell if (or when) the refclock maintainer will see anything posted here.

-- HarlanStenn - 13 Apr 2005

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