r2 - 2019-12-20 - 15:40:53 - ShaneBishopYou are here: NTP >  Servers Web > PublicTimeServer000208
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.
  • ntp is an alias and the IP address may change; please use DNS

ServerStratum StratumOne
CountryCode CZ
Hostname ntp.cesnet.cz
IP Address
IPv6 Address

UseDNS Yes
PoolMember Yes
ServerLocation [[https://www.cesnet.cz/english][CESNET]Prague, The Czech Republic

GeographicCoordinates 50 6.11' N, 14 23.49' E, +252 m
ServerSynchronization NTP V4 primary (Garmin GPS35), PC / Linux with nanokernel
ServiceArea Czech Republic and Slovakia, European academic community
AccessPolicy RestrictedAccess
AccessDetails Open to servers providing synchronization to ten or more hosts, others by arrangement.
NotificationMessage Yes



ServerContact Vladimir Smotlacha (ntp-admin@cesnet.cz)
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