Re: winXP & NTP
- From: Unruh <unruh-spam@xxxxxxxxxxxxxx>
- Date: Sun, 11 Mar 2007 23:56:10 +0100 (CET)
Shion Uzuki <suzuki@xxxxxxxxxxx> writes:
For Windows XP hosts that have not installed the Daylight Savings Time
patch, when syncing with the ISP's UNIX-based NTP server, the time
received is wrong.
However, on XP hosts that are patched, the correct time is received when
syncing with the NTP server. How can the same NTP server simultaneously
deliver different times to requesting hosts? Is it because of Windows
improperly handling of the NTP?
In a Windows system, the system time is kept in local time. Taht includes
all DST changes. Ie, the windows ntp server takes the UTC time from the ntp
server, and changes it into local time. If the algorithm to change to local
time is wrong, the ntp time will be wrong. On a Linux system ALL systems
times are UTC, which is the same time as ntp is in. No translations are
needed.
S.U..
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