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.

Testing Lab Infrastructure

Equipment

Agilent's "replacement" is the Agilent 53132A Universal Frequency Counter, which "only" resolves to 125ps.

Alternatives include:

• https://www.thinksrs.com/products/SR620.htm
• https://www.thinksrs.com/products/SR625.htm

-- HarlanStenn - 27 Mar 2009

For a frequency standard, https://www.thinksrs.com/products/FS725.htm is useful as it includes a power supply, the RS232 interface, and a distribution amplifier for the output signal (near as I can remember). This is compared to https://www.thinksrs.com/products/PRS10.htm .

-- HarlanStenn - 19 Jun 2009

Infrastructure

We will likely want to be testing how temperature changes affect the crystal on a motherboard.

-- HarlanStenn - 27 Mar 2009

Support Staff

Discussion and Comments