xntpd startup...Is it safe?


 
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Operating Systems AIX xntpd startup...Is it safe?
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Old 12-21-2005
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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NTPD(8) 						      System Manager's Manual							   NTPD(8)

NAME
ntpd - "Network Time Protocol daemon" SYNOPSIS
ntpd [-dnSsv] [-f file] DESCRIPTION
The ntpd daemon synchronizes the local clock to one or more remote NTP servers or local timedelta sensors. ntpd can also act as an NTP server itself, redistributing the local time. It implements the Simple Network Time Protocol version 4, as described in RFC 2030, and the Network Time Protocol version 3, as described in RFC 1305. ntpd uses the adjtime(2) system call to correct the local system time without causing time jumps. Adjustments larger than 128ms are logged using syslog(3) with LOG_INFO priority. The threshold value is chosen to avoid having local clock drift thrash the log files. Should ntpd be started with the -d option, all calls to adjtime(2) will be logged. When ntpd starts up, it reads settings from a configuration file, typically ntpd.conf(5). The options are as follows: -d Do not daemonize. If this option is specified, ntpd will run in the foreground and log to stderr. -f file Use file as the configuration file, instead of the default /etc/openntpd/ntpd.conf. -n Configtest mode. Only check the configuration file for validity. -S Do not set the time immediately at startup. This is the default. -s Set the time immediately at startup if the local clock is off by more than 180 seconds. Allows for a large time correction, elimi- nating the need to run rdate(8) before starting . -v This option allows ntpd to send DEBUG priority messages to syslog. When ntpd receives a SIGINFO signal, it will write its peer and sensor status to syslog. FILES
/etc/openntpd/ntpd.conf default ntpd configuration file /var/lib/openntpd/ntpd.drift drift file, written by ntpd periodically and used at startup to get the initial clock drift SEE ALSO
date(1), adjfreq(2), adjtime(2), ntpd.conf(5), rdate(8), timed(8) , Network Time Protocol (Version 3), March 1992. , Simple Network Time Protocol (SNTP) Version 4, October 1996. HISTORY
The ntpd program first appeared in OpenBSD 3.6 . $Mdocdate: November 10 2007 $ NTPD(8)