xntpd startup...Is it safe? Post: 93733

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Operating Systems AIX xntpd startup...Is it safe? Post 93733 by DenD on Wednesday 21st of December 2005 04:54:08 PM

12-21-2005

Registered User

xntpd startup...Is it safe?

Hi,
Have never run xntpd before. I have my ntp.conf file configured with server, trace file and drift file. I commented out the "broadcastclient" entry since I only want to get the time from a single source. Port 123 is in the /etc/services file for tcp and udp. Port 123 has been enabled in the ISA firewall so it can get to the outside time server.

Can I cause any damage bringing this up during the middle of the day when there are many users on the system if it doesn't run correctly?

After my research, I am assuming that I run "startsrc -s xntpd" to start and then run "stopsrc -s xntpd" to stop the daemon if there is a problem.

If all runs well, then I uncomment the xntpd startup in /etc/rc.tcpip to run the daemon upon system boot. Correct?

Thanks in advance for any input or advice anyone can give me.

Last edited by DenD; 12-21-2005 at 05:56 PM.. Reason: typo

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LEARN ABOUT OSF1

ntp.drift

ntp.drift(4)						     Kernel Interfaces Manual						      ntp.drift(4)

NAME

       ntp.drift - Network Time Protocol (NTP) drift file

DESCRIPTION

       When  the  NTP daemon (xntpd) is first started, it computes the error in the intrinsic frequency of the clock on the computer it is running
       on.  This process usually takes about a day or two after the daemon is started to compute a good estimate of this  (and	it  needs  a  good
       estimate to synchronize closely to its server).	Once the initial value is computed, it will change only by relatively small amounts during
       the course of continued operation.

       The driftfile declaration should always be included in the ntp.conf file.  This provides xntpd with complete path name to a file  in  which
       it can store the current value of the frequency error.  That way, if the daemon is stopped and restarted, it can reinitialize itself to the
       previous estimate without spending time recomputing the frequency estimate.

       The ntp.drift file contains one line with the following format: freq_offset flag Specifies the nominal frequency  offset.   DO  NOT  modify
       this  field.  Specifies the method used to improve system clock accuracy.  Specifies that xntpd runs a Phase-Locked Loop (PLL) algorithm to
       keep synchronized with other hosts.  This is the default.  Specifies the use of the  PLL  algorithm  in	the  kernel.   This  requires  the
       NTP_TIME kernel option.	After the option is configured in the kernel, edit the ntp.drift file and change the flag value to 1.

	      See System Administration for information on the NTP_TIME kernel option.

FILES

       Conventional name of the drift file

RELATED INFORMATION

       Commands: ntpdate(8), ntpq(8), xntpd(8), xntpdc(8)

       Files: ntp.conf(4)

       Network Administration, System Administration delim off

																      ntp.drift(4)