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Windows Vista™ Administrator's Pocket Consultant by William R. Stanek

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Managing Internet Time

System time has an increasingly important role as the Windows operating system matures, particularly with regard to Kerberos security, which is the default Windows Vista authentication mechanism. With NTLM version 2 and Kerberos version 5 security, the network depends on system clocks being in close synchronization. If the clocks on different systems aren’t closely synchronized, authentication tickets can become invalid before they reach a destination host, which can prevent logon and authentication.

Internet Time Overview

Keeping the system synchronized with the actual time isn’t easy. System clocks can lose time, users can accidentally set the system clock to the wrong time, and other things can also go wrong. To help resolve ...

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