88 lines
3.4 KiB
Plaintext
88 lines
3.4 KiB
Plaintext
|
==============================
|
||
|
|
Date/Time Control Panel
|
||
|
|
==============================
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
==============================
|
||
|
|
Internet Time Tab
|
||
|
|
==============================
|
||
|
|
|
||
|
|
DESCRIPTION:
|
||
|
|
===============
|
||
|
|
The internet time section of the Date/Time control panel is made up of several parts:
|
||
|
|
|
||
|
|
timedate.cpl:
|
||
|
|
The CPL will allow users to change settings which are stored in the registry. The W32Time service is then sent notifications that settings changed.
|
||
|
|
The settings are per-machine so only admins can modify this UI. d
|
||
|
|
|
||
|
|
|
||
|
|
W32Time.dll: (NT Service)
|
||
|
|
The service will then sync at the appropriate time to the appropriate place (DC Time Server vs. internet NTP server).
|
||
|
|
|
||
|
|
time.windows.com: (WindowsUpdate service)
|
||
|
|
Our team
|
||
|
|
|
||
|
|
|
||
|
|
BEHAVIOR:
|
||
|
|
===============
|
||
|
|
Specs:
|
||
|
|
General: http://neptune/arch/gen/AutoSetTimeDate.htm
|
||
|
|
Server Deployment: http://www.faqs.org/rfcs/rfc1769.html
|
||
|
|
NTP: http://www.faqs.org/rfcs/rfc1769.html
|
||
|
|
|
||
|
|
|
||
|
|
// This key determins how often we sync from the internet NTP server. Not applicable to DC time servers.
|
||
|
|
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer, "SpecialPollInterval", REG_DWORD = 604800 (1 once per day)
|
||
|
|
|
||
|
|
// This key determins if we try DC time server, internet time servers, or both. AllSync is both.
|
||
|
|
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters, "Type", REG_SZ = "AllSync"
|
||
|
|
|
||
|
|
// This key is used by the service to determine the server(s) to get the internet time from:
|
||
|
|
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer, "NtpServer", REG_SZ = "time.windows.com,0x3"
|
||
|
|
|
||
|
|
|
||
|
|
TOP QUESTIONS:
|
||
|
|
===============
|
||
|
|
Q: Why is the "Internet Time" hidden sometimes?
|
||
|
|
A: This tab will not modify the behavior when time comes from the admin controled DC time server. I hide the tab if:
|
||
|
|
1. The machine is joined to a domain, AND
|
||
|
|
2. We search the domain and find a domain control that will act as a time server
|
||
|
|
|
||
|
|
Q: Why is the UI grayed out?
|
||
|
|
A: You need admin privilages to modify these values.
|
||
|
|
|
||
|
|
Q: Will this work with Personal FireWall or other NAT based Firewalls?
|
||
|
|
A: Yes.
|
||
|
|
|
||
|
|
Q: Will this work with other popular firewalls (CERN/web proxies, routers that block addresses).
|
||
|
|
A: No, most firewalls will block NTP's UDP packets on port 123. Admins can open these ports if they want, but almost never do.
|
||
|
|
|
||
|
|
Q: Why is there a small pause before the "Internet Time" tab appears.
|
||
|
|
A: We need to search the domain for a DC that will provide the time. This takes a few seconds on a large corp net, like Microsoft.
|
||
|
|
We need to do this because we may need to keep the tab hidden. Some laptops will be joined to a domain and plug and un-plug from
|
||
|
|
the corp net. We need the CPL to display the tab in the right cases, so we need to do a search each time. This won't block
|
||
|
|
the UI thread.
|
||
|
|
|
||
|
|
Q: Will this work with other popular firewalls (CERN/web proxies, routers that block addresses).
|
||
|
|
A: No, most firewalls will block NTP's UDP packets on port 123. Admins can open these ports if they want, but almost never do.
|
||
|
|
|
||
|
|
Q: How can I force the time to sync now?
|
||
|
|
A: In a cmd.exe window, do the following commands:
|
||
|
|
1. net stop W32time
|
||
|
|
2. net start W32time
|
||
|
|
|
||
|
|
|
||
|
|
CONTACTS:
|
||
|
|
===============
|
||
|
|
Time/Date CPL: GPease (Dev), JoelGros (PM)
|
||
|
|
Internet Time: BryanSt (Dev), JoelGros (PM), SKean (Test)
|
||
|
|
W32Time Service: DuncanB (Dev), AdamBarg (Test), MattT (Dev Lead)
|
||
|
|
Personal Firewall: Denmor (PM Dennis Morgan), EJohnson (Test), JonBurs (DEV)
|
||
|
|
|
||
|
|
|