![]() When it comes to security, if you cannot successfully compare logs between each of your routers and all your network servers, you will find it very hard to develop a reliable picture of an incident. Without synchronized time, accurately correlating information between devices becomes difficult, if not impossible. This makes synchronized time extremely important. ![]() It provides the only frame of reference between all devices on the network. Time is inherently important to the function of routers and networks. In essence, all debugging, security, audit, and authentication is founded on the basis of event correlation (knowing exactly what happened in what order, and on which side), and that depends on good time synchronization.Īnother good explanation for this issue comes from Thomas Akin, in chapter 10 of his book Hardening Cisco Routers: Within law enforcement, they are essential for correlation of distributed communication events, forensic analysis, and potential evidentiary use in criminal proceedings. In a programming environment, time stamps are usually used to determine what bits of code need to be rebuilt as part of a dependency checking process as they relate to other bits of code and the time stamps on them, and without good time stamps your entire development process can be brought to a complete standstill. In a commercial environment, accurate time stamps are essential to everything from maintaining and troubleshooting equipment and forensic analysis of distributed attacks, to resolving disputes among parties contesting a commercially valuable time-sensitive transaction. NTP version 3 was an internet draft standard, formalized in RFC 1305. RFC 5908: Network Time Protocol (NTP) Server Option for DHCPv6.RFC 5907: Definitions of Managed Objects for Network Time Protocol Version 4 (NTPv4).RFC 5906: Network Time Protocol Version 4: Autokey Specification.RFC 5905: Network Time Protocol Version 4: Protocol and Algorithms Specification. ![]() It is specified by the following documents: NTP version 4 is a significant revision of the previous NTP standard, and is the current development version. ![]() NTP is a protocol designed to synchronize the clocks of computers over a network to a common timebase (usually UTC). Please see our Security Notice for up to date information about security related issues pertaining to the Reference Implementation of NTP.ĬodeAudit describes some of the procedures and efforts that go in to auditing the NTP codebase and making sure it is secure. Please refrain from discussing potential security issues in public fora such as the Usenet news-group, our Bug Tracking system, or any other mailing-list. Security related bugs, confirmed or suspected, are to be reported by e-mail to our Security Officer Key to report issues. ![]()
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