{"id":59879,"date":"2025-12-21T07:40:41","date_gmt":"2025-12-21T07:40:41","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/nist-tried-to-pull-the-pin-on-ntp-servers-after-blackout-caused-atomic-clock-drift\/"},"modified":"2025-12-21T07:40:41","modified_gmt":"2025-12-21T07:40:41","slug":"nist-tried-to-pull-the-pin-on-ntp-servers-after-blackout-caused-atomic-clock-drift","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/nist-tried-to-pull-the-pin-on-ntp-servers-after-blackout-caused-atomic-clock-drift\/","title":{"rendered":"NIST tried to pull the pin on NTP servers after blackout caused atomic clock drift"},"content":{"rendered":"<p>A staffer at the USA\u2019s National Institute of Standards and Technology (NIST) tried to disable backup generators powering some of its Network Time Protocol infrastructure, after a power outage around Boulder, Colorado, led to errors.<\/p>\n<p>As explained in a <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/groups.google.com\/a\/list.nist.gov\/g\/internet-time-service\/c\/o0dDDcr1a8I\">mailing list post<\/a> by Jeffrey Sherman, a NIST supervisory physicist who maintains the institute\u2019s atomic clocks, \u201cThe atomic ensemble time scale at our Boulder campus has failed due to a prolonged utility power outage.\u201d<\/p>\n<p>Sherman, whose LinkedIn bio proclaims he is \u201cOne of the few federal employee actually paid to watch the clocks all day,\u201d says one impact of the incident \u201cis that the Boulder Internet Time Services no longer have an accurate time reference.\u201d<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,dmpu,\" data-sm=\",fluid,mpu,dmpu,\" data-md=\",fluid,mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>That\u2019s bad because one of the things NIST uses its atomic clocks for is to provide a Network Time Protocol service, the authoritative source of timing information that the computing world relies on so that diverse systems can synchronize events. If NTP isn\u2019t working, outcomes can include difficulties authenticating between systems, meaning applications can become unstable.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>At this point, readers might wonder why NIST can\u2019t just turn off the inaccurate service. Sherman said a backup generator kicked in and kept the servers running.<\/p>\n<p>\u201cI will attempt to disable them [the generators] to avoid disseminating incorrect time,\u201d he wrote.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,dmpu,\" data-sm=\",fluid,mpu,dmpu,\" data-md=\",fluid,mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>But the storms that caused the outage were so severe, only emergency services personnel are allowed to visit the site.<\/p>\n<p>His post says he has seen \u201cstrong evidence one of the crucial generators has failed. In the downstream path is the primary signal distribution chain, including to the Boulder Internet Time Service.\u201d<\/p>\n<p>\u201cAnother campus building houses additional clocks backed up by a different power generator; if these survive it will allow us to re-align the primary time scale when site stability returns without making use of external clocks or reference signals,\u201d he added.<\/p>\n<p>Xcel Energy, the local utility, <a target=\"_blank\" href=\"https:\/\/co.my.xcelenergy.com\/s\/outage-safety\/wildfires\/power-shutoffs\/event-update\">blamed<\/a> the outage on strong winds and as of Saturday night local time (7:00PM MT Dec 20, 2:00AM UTC Dec 21) advised most customers would have power again within three hours.<\/p>\n<p>However at the time of writing \u2013 00:15 MT Dec 21 \u2013 NIST\u2019s <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/tf.nist.gov\/tf-cgi\/servers.cgi\">status page<\/a> states the Boulder site is experiencing \u201cFacility outages\u201d and a \u201c&lt; 4.8us clock error.\u201d That\u2019s about four microseconds.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" id=\"story_eagle_xsm_sm_md_xmd_lg_xlg\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",mpu,dmpu,\" data-sm=\",mpu,dmpu,\" data-md=\",mpu,dmpu,\" data-xmd=\",mpu,dmpu,\" data-lg=\",mpu,dmpu,\" data-xlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33aUenXA7IhXG84YzkfKmJcQAAA0g&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>NIST <a target=\"_blank\" rel=\"nofollow\" href=\"https:\/\/www.cbsnews.com\/colorado\/news\/power-outage-boulder-atomic-clock-nist\/\">told CBS News<\/a> it warned users such as telcos and aerospace organizations that weather around Boulder could cause problems, and advised them to tap the org\u2019s other sources of time information.<\/p>\n<p>That\u2019s sound advice as best practice for using NTP is to specify multiple servers, and failover from troubled sources of time info to accurate ones. This incident therefore shouldn\u2019t trouble the prudent, but may leave some NTP feed users unawares if they rely solely on the Boulder facility\u2019s time feeds. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2025\/12\/21\/nist_ntp_outage_warning\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A rare case of deliberately trying to induce an outage A staffer at the USA\u2019s National Institute of Standards and Technology (NIST) tried to disable backup generators powering some of its Network Time Protocol infrastructure, after a power outage around Boulder, Colorado, led to errors.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-59879","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>NIST tried to pull the pin on NTP servers after blackout caused atomic clock drift 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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