{"id":657,"date":"2009-11-30T11:32:08","date_gmt":"2009-11-30T11:32:08","guid":{"rendered":"https:\/\/galsys.co.uk\/news\/?p=657"},"modified":"2018-05-10T08:42:22","modified_gmt":"2018-05-10T08:42:22","slug":"time-synchronisation-on-a-windows-7-network","status":"publish","type":"post","link":"https:\/\/www.galsys.co.uk\/news\/time-synchronisation-on-a-windows-7-network\/","title":{"rendered":"Time Synchronisation on a Windows 7 Network"},"content":{"rendered":"

<\/p>\n

Windows 7 is the latest instalment in the Microsoft operating system family. Following on from the much maligned Windows Vista, Windows 7 has a much warmer reception from critics and consumers.<\/p>\n

Time synchronisation on Windows 7 is extremely straight forward as the protocol NTP<\/a> (Network Time Protocol) is built-in to Windows 7 and the operating system automatically synchronises the computer\u2019s clock by connecting to the Microsoft time service time.windows.com.<\/p>\n

This is useful for many home users but the synchronisation across the Internet is not secure enough for a computer network for the following reason:<\/p>\n

To connect to any Internet time source such as time.windows.com a post is required to be left open in the firewall. As with any open port in a network firewall this can be used as a point of entry by a malicious user or some malicious software.<\/p>\n

The time synchronisation facility in Windows 7 can be turned off and is quite simple to do by opening the time and date dialogue box and uncheck the synchronization box.<\/p>\n

However, time synchronisation on a network is vital so if the Internet time service is turned off it needs to be replaced with a secure and accurate source of time.<\/p>\n

By far the best way of doing this is to use a time source that\u2019s external to the network (and the firewall).<\/p>\n

The simplest, safest and most accurate way of synchronizing a Windows 7 network is to use a dedicated NTP server<\/a>. These devices use a time reference from either a radio frequency (usually distributed by national physics laboratories such as Britain\u2019s NPL and America\u2019s NIST<\/a>) or from the GPS satellite network.<\/p>\n

Because both these reference sources come from atomic clock sources they are incredibly accurate too and a Windows 7 network that consists of hundreds of machines can be synchronised to within a few milliseconds of the global timescale UTC (Coordinated Universal Time) by utilising just one NTP time server<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Windows 7 is the latest instalment in the Microsoft operating system family. Following on from the much maligned Windows Vista, Windows 7 has a much warmer reception from critics and consumers. Time synchronisation on Windows 7 is extremely straight forward as the protocol NTP (Network Time Protocol) is built-in to Windows 7 and the operating…<\/p>\n

Continue reading <\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,62,13,14,15],"tags":[204,30,206,82,36],"class_list":["post-657","post","type-post","status-publish","format-standard","hentry","category-atomic-clocks","category-network-security","category-time-synchronisation","category-timing-source","category-windows","tag-ntp-server-2","tag-ntp-time-server","tag-time-synchronisation","tag-windows-7","tag-windows-time-server"],"yoast_head":"\nTime Synchronisation on a Windows 7 Network - Galleon Systems<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.galsys.co.uk\/news\/time-synchronisation-on-a-windows-7-network\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Time Synchronisation on a Windows 7 Network - Galleon Systems\" \/>\n<meta property=\"og:description\" content=\"Windows 7 is the latest instalment in the Microsoft operating system family. 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