Abstract
As of now, all servers have an equipment or programming clock to which reference is made to time stamp records, exchanges, messages, and so forth. This clock, albeit structured around a quartz oscillator, floats like any customary watch, which implies this common watch cannot a match to such created machines that are networked and share common resources like file systems. For example, UNIX is a development tool which makes command, based on its work on comparing file modification dates. Similarly, the correlation of log messages from several systems becomes very difficult if they are not at the same time. In this article, we will concentrate on this topic by designing a server utilizing the NTP convention since the primary “focus” of the NTP usage is UNIX frameworks, and to be more explicit, we will see the management of the NTP server with the Chrony tool.
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References
Dinar, A.E., Ghouali., S., Merabet, B., Feham, M.: Packet synchronization in an network time protocol server and ASTM Elycsys packets during detection for cancer with optical DNA Biochip. In: International Congress on Health Sciences and Medical Technologies, Tlemcen, Algeria, 5–7 December (2019)
Zhao, K.J., Zhang, A.I., Mning, D.Y.: Implementation of network time server system based on NTP. Electronic Test 7, 13–16 (2008)
Li, X.Z.H.: Research on the Network Time Synchronization System Based on IEEE1588. National Time Service Center, Chinese Academy of Sciences (2011)
Novick, A., Lombardi, M.: A comparison of NTP servers connected to the same reference clock and the same network. In: Proceedings of the 2017 Precise Time and Time Interval Systems and Applications Meeting, Monterey, California, pp. 264–270, 30 January–2 February (2017)
Warrington, R.B., Fisk, P.T.H., Wouters, M.J., Lawn, M.A., Thorn, J.S., Quigg, S., Gajaweera, A., Park, S.J.: Time and Frequency Activities at the National Measurement Institute, Australia. Frequency Control Symposium and Exposition. In: Proceedings of the IEEE International, pp. 231–234 (2005)
Mills, D.L.: Internet Time Synchronization: The Network Time Protocol. IEEE Trans. Commun. 39(10) (1991)
IEEE Std 1588-2008: IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems. IEEE1588-2008 Standard (2008)
https://www.thegeekdiary.com/what-is-the-refid-in-ntpq-p-output/. Last accessed 12 Aug 2019
Langer, M., Behn, T., Bermbach, R.: Securing Unprotected NTP Implementations Using an NTS Daemon. In: IEEE International Symposium on Precision Clock Synchronization for Measurement Control and Communication (ISPCS) (2019). https://doi.org/10.1109/ispcs.2019.8886645
Lombardi, M., Levine, J., Lopez, J., Jimenez, F., Bernard, J., Gertsvolf, M., et al.: International Comparisons of Network Time protocol Servers. In: Proceedings of the 2014 Precise Time and Time Interval Systems and Applications Meeting, Boston, Massachusetts, pp. 57–66, 1–4 December (2014)
Sommars, S.E.: Challenges in Time Transfer Using the Network Time Protocol (NTP). In: Proceedings of the 48th Annual Precise Time and Time Interval Systems and Applications Meeting, California, pp. 271–290, January (2017)
Vijayalayan, K., Veitch, D.: Rot at the roots examining public timing infrastructure. In: Proceedings of the 35th Annual IEEE International Conference on Computer Communications, San Francisco, California, pp. 1–9, April (2016)
Matsakis, D.: Time and Frequency Activities at the U.S. Naval Observatory. Frequency Control Symposium and Exposition. In: Proceedings of the 2005 IEEE International, pp. 271–224 (2005)
Mills, D.L.: RFC1305 - NTPv3. http://rfc-editor.org/. Last accessed 25 Oct 2018
Mills, D.L.: RFC4330 - SNTPv4. http://rfc-editor.org/. Last accessed 25 Oct 2018
https://chrony.tuxfamily.org. Last accessed 24 Sept 2018
Bennabti, S., Dinar, A.E., Merzougui, R., Merabet, B., Ghouali, S.: Risk cryptography planning in telecommunications systems ‘CRYP-TS’: attack strategy & ethical hacking. In: Conference on Electrical Engineering CEE, Ecole Militaire Polytechnique, Algiers (2019)
Hoffmann, M., Toorop, W.: NTP Working Group A. Malhotra Internet-Draft Boston University Intended Status: Informational K. Teichel Expires: 9 January 2020 PTB. https://datatracker.ietf.org/meeting/105/agenda/ntp-drafts.pdf. Last accessed 02 July 2019
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Dinar, A.E., Merabet, B., Ghouali, S. (2021). NTP Server Clock Adjustment with Chrony. In: Mandal, J., Mukhopadhyay, S., Roy, A. (eds) Applications of Internet of Things. Lecture Notes in Networks and Systems, vol 137. Springer, Singapore. https://doi.org/10.1007/978-981-15-6198-6_16
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DOI: https://doi.org/10.1007/978-981-15-6198-6_16
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