Public NTP Service

 

　This service is going to cease in the near future. Please change your settings, if you are using this service.

 

　Japanese version is here.

 

 

■Topics

• Temporary suspension of 133.100.9.2 service
  Due to the construction for switching the line of Science Information network (SINET), the NTP service of 133.100.9.2 will be unavailable for the following period. The service outage time may vary slightly.
  Service interruption time: Sunday, March 13, 2022, 5:00 pm to 6:00 pm (JST) (about 30 minutes of this time period).   (Published: February 17, 2022)
• Switching the AS number
  The network for the public NTP service has been switched from AS18148 to AS63785. (Published: March 24, 2021)
• Obtaining the AS number
  For the stable operation of our campus network, we have obtained an AS number dedicated to the public NTP service. The AS number is 63785. (Published: January 12, 2021)
• Temporary suspension of 133.100.9.2 service
  Due to maintenance, the NTP service of 133.100.9.2 will be unavailable for the following period. The service outage time may vary slightly.
  Service interruption time: Wednesday, August 5, 2020, 1:00 pm to 6:00 pm (JST).   (Published: August 3, 2020)
• Temporary suspension of 133.100.9.2 service
  Due to maintenance, the NTP service of 133.100.9.2 will be unavailable for the following period. The service outage time may vary slightly.
  Service interruption time: Monday, August 3, 2020, 1:00 pm to 6:00 pm (JST).   (Published: August 2, 2020)
• Temporary suspension of 133.100.9.2 service
  Due to maintenance, the NTP service of 133.100.9.2 will be unavailable for the following period. The service outage time may vary slightly.
  Service interruption time: Saturday, July 18, 2020, 9:00 pm (JST) to Sunday, July 19, 2020, Until 2:00 am (JST).   (Published: June 30, 2020)
• Official Twitter
  Public NTP Service Official Twitter has released. (Published: June 26, 2019)
• Temporary suspension of 133.100.9.2 service
  The NTP service of 133.100.9.2 experimentally suspends. The suspension period is scheduled to be 5:00 PM from 9:00 AM on June 30, 2019. (Published: June 11, 2019)
• Cease NTP service of 133.100.11.8
  The NTP service of 133.100.11.8 doesn’t respond to any request packets, because the NTP service has ended. There is no plan to resume the service. (Published: March 12, 2019)
• Removed DNS records
  Forward and reverse DNS lookups for 133.100.9.2 and 133.100.11.8 has removed. (Published: March 12, 2019)
• Resume service of 133.100.11.8
  The NTP service of 133.100.11.8 was resumed. (Published: March 1, 2019)
• Temporary suspension of 133.100.11.8 service
  The NTP service of 133.100.11.8 experimentally suspends. The suspension period is scheduled to be February 28 from 9:30 AM on February 6, 2019. The NTP service of 133.100.9.2 doesn’t stop. (Published: Feb 5, 2019)
• Erased Public Time Server Lists from www.ntp.org
  The NTP servers were deleted from “Public Time Server Lists (Public NTP Primary (stratum 1) Time Servers)” of www.ntp.org. (Published: Aug. 9, 2018)

 

 

■About Public NTP Service

　Since October 1993, Fukuoka University has provided public NTP service (time synchronization service) using GPS to the world. There is the IPv4 address providing NTP service as follows.

 

• 133.100.9.2
• 133.100.11.8 (ceased providing the service on March 12, 2019)

 

　However, in recent years traffic of this service has been increasing, and as of January 2021, approximately 220Mbps which is the average daily bandwidth and approximately 288,000pps (packets per second) are constantly receiving. As it is, there is a danger that it will have a serious impact on the stable operation of the campus network, so we are currently implementing bandwidth limitations. We appreciate your understanding and cooperation.

　In addition, the traffic is still increasing little by little, so it is difficult to stably operate the campus network, so we have decided to “cease this service in the future”. We will conduct various experiments in the future and prepare for the service stop while consulting with network operators. When the stop the date is decided, we will publicize.

 

 

■Related links

• JANOG 47 (JApan Network Operators’ Group)
  Recent report on the Fukuoka University Public NTP Service(January 2021)
  Recent report on the Fukuoka University Public NTP Service(Japanese version)

• LACNOG 2019 (Latin America and Caribbean Region Network Operators Group 2019)
  Fukuoka University Public NTP Service Deployment Use Case(October 2019)
  Fukuoka University Public NTP Service Deployment Use Case(Japanese version)

• APRICOT 2019 (Asia Pacific Regional Internet Conference on Operational Technologies)
  FUKUOKA UNIVERSITY PUBLIC NTP SERVICE & BCP38(February 2019)

• VNIX-NOG 2018 (VNIX NETWORK OPERATORS GROUP CONFERENCE 2018)
  Public NTP Service Deployment Use case(August 2018)
  JPNIC VNIX-NOG 2018 report(September 2018)

• 2018 TWNOG (The Taiwan Network Operators’ Group )
  Public NTP Service Deployment Use case(June 2018)

• APRICOT 2017 (Asia Pacific Regional Internet Conference on Operational Technologies)
  Fukuoka University Public NTP Service Deployment Use case(February 2017)
  Fukuoka University Public NTP Service Deployment Use case (Japanese version)

 

 The following links are Japanese only.

• Journal of The Institute of Electronics, Information and Communication Engineers(May 2019, Vol.102, No.5)
  IoT_and_Public_NTP_Service

• Information Processing Society of Japan(IPSJ)
  The 81st National Convention of Information Processing Society of Japan
  The history and future of Internet service considered from Fukuoka University’s public NTP service(March 2019)

• Academic eXchange for Information Environment and Strategy 2018 Annual Conference
  Current status and issues of public NTP service at Fukuoka University(November 2018)

• QUNOG 12 (Q-Shu(Kyushu) and Uchina(Okinawa) Network Operators’ Group)
  Fukuoka University Public NTP Service Deployment Use case(October 2018)

• JANOG 41 (JApan Network Operators’ Group)
  Current status and issues of public NTP service at Fukuoka University(January 2018)
  Presenter interview: Current status and issues of public NTP service at Fukuoka University(January 2018)

• ENOG 47 (Echigo Network Operators’ Group)
  Operation and issues of public NTP server(October 2017)

• QUNOG 8 (Q-Shu(Kyushu) and Uchina(Okinawa) Network Operators’ Group)
  Current status and issues of public NTP service at Fukuoka University(June 2017)

• IPSJ(Information Processing Society of Japan) SIG Internet and Operation Technology
  The 35th Internet and Operation Technology
  Operation and issues of public NTP service(September 2016)

• JANOG 38 (JApan Network Operators’ Group) QUNOG 5 BoF
  The NTP service at Fukuoka University(July 2016)