Tag Archives: ntp

NTP Server

Setting up this NTP server on a linux box is one of the simplest services to install. Here is the walkthrough:

On a linux server:

apt-get install ntp
nano /etc/ntp.conf
Restart ntpd with /etc/init.d/ntp-server restart

On a cisco device:

ntp server <IP OF SERVER>

This is how to setup the cisco device to the right timezone and recalculate for daylight savings time (this is for the America/Central TZ):

clock timezone CST -6 0
clock summer-time CDT recurring last Sun Mar 2:00 last Sun Oct 2:00

Enjoy and if you have any questions comment or send me a message on the contact me page

Source:
http://support.ntp.org/bin/view/Support/InstallingNTP

Windows Clock/NTP Sync

For awhile I noticed that my desktop’s clock was off by about an hour and some and this finally bugged me enough to find the cure. Essentially it was my active directory server’s clock was off as well and that’s where the desktop’s clock pulls its time from. So with a few google hits I found how to force a refresh of the clock. In command line simply punch in:

w32tm /resync

Unfortunately my Windows 2008 R2 server only spit out this error after that:

C:\Users\Administrator> w32tm /resync
Sending resync command to local computer
The computer did not resync because no time data was available.

After googling around I then found a series of commands to sync to another NTP server:

C:\>netdom /query fsmo
C:\>net stop w32time
C:\> w32tm /config /syncfromflags:manual /manualpeerlist:"0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org"
C:\>w32tm /config /reliable:yes
C:\>net start w32time
C:\>w32tm /query /configuration

Following this all clocks were running on time for once.

Sources:

http://defaultreasoning.wordpress.com/2009/11/16/synchronize-time-with-external-ntp-server-on-windows-server-2008-r2/
http://www.howtogeek.com/howto/windows-vista/sync-your-clock-with-internet-time-servers-from-the-vista-command-prompt/