Server time update problem

SUSE Linux Enterprise Server SLES Networking
1

Hello,
i have few servers with sles 11sp2 which have problems updating time from local server.
After some investigation i found out that server is comunicating via high ports which are blocked cause servers are in dmz. Is there a way to force using 123 port.

I’m trying to updiate via
#ntpdate LANtimeserver
or
#sntp -P no -r LANtimeserver
sntp: not enough valid responses received in time

i can see the time via, but still can’t force to update system time.
server3:~ # ntpq -p
remote refid st t when poll reach delay offset jitter

*LANtimeserver othertimeserver 4 u 62 64 377 0.907 -339.52 117.901
LOCAL(0) .LOCL. 10 l 31 64 377 0.000 0.000 0.001

any advise how can i force to update from time server. Only port available 123.
Thanks in advance.

2

Hi
I can’t see those options in the man page for sntp?

Can you just try -d eg;

sntp -d time-b.nist.gov

22 May 23:47:29 sntp[11950]: Started sntp
Starting to read KoD file /var/db/ntp-kod...
sntp sendpkt: Sending packet to 129.6.15.29... Packet sent.
sntp recvpkt: packet received from 129.6.15.29 is not authentic. Authentication not enforced.
sntp handle_pkt: Received 48 bytes from 29.6.15.29
sntp offset_calculation: t21: 0.031932 t34: -0.068505 delta: 0.100437 offset: -0.018287
2012-05-22 23:47:29.114995 (+0600) -0.018287

–
Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop
up 6:58, 4 users, load average: 0.03, 0.05, 0.05
CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU

3

[QUOTE]Hi
I can’t see those options in the man page for sntp?

Can you just try -d eg;
[/QUOTE]

Hello,
server3:~ # sntp -d LANtimeserver
Syntax: sntp [ --help | -h | -? ] [ -v | -V | -W ]
[ -q [ -f savefile ] |
[ [ -F ] { -r | -a } [ -P prompt ] [ -l lockfile ] ]
[ -c count ] [ -e minerr ] [ -E maxerr ]
[ -d delay | -x [ separation ] [ -f savefile ] ]
[ -4 | -6 ] [-u] [ address(es) ] ]

In previous servers there was sles 10.4 and i used ntpdate and everything worked find, now it gives:

!!!!!!!!!!!!!!  WARNING !!!!!!!!!!!!!!!!!!

The ntpdate program is deprecated and should not be used any more.  To
quote the upstream ntp developers:

  "The functionality ntpdate offered is now provided by the ntpd daemon
  itself.  If you call ntpd with the command line option -q it will
  retrieve the current time and set it accordingly."

Please check the Network Time Protocol (NTP) daemon man page and
  http://support.ntp.org/bin/view/Dev/DeprecatingNtpdate
for further information.

You can replace the ntpdate call with "rcntp ntptimeset" to achieve an
inital poll of the servers specified in /etc/ntp.conf.

The program /usr/sbin/sntp offers comparable functionality to ntpdate.
Specifically
  sntp -P no -r pool.ntp.org
is equivalent to
  ntpdate pool.ntp.org

For further details please refer to the man page of sntp.
4

[QUOTE=danskemk][color=blue]

Hi
I can’t see those options in the man page for sntp?

Can you just try -d eg;
[/color]

Hello,
server3:~ # sntp -d LANtimeserver
Syntax: sntp [ --help | -h | -? ] [ -v | -V | -W ]
[ -q [ -f savefile ] |
[ [ -F ] { -r | -a } [ -P prompt ] [ -l lockfile ] ]
[ -c count ] [ -e minerr ] [ -E maxerr ]
[ -d delay | -x [ separation ] [ -f savefile ] ]
[ -4 | -6 ] [-u] [ address(es) ] ]

In previous servers there was sles 10.4 and i used ntpdate and
everything worked find, now it gives:

Code:

!!! WARNING !!!

The ntpdate program is deprecated and should not be used any more. To
quote the upstream ntp developers:

“The functionality ntpdate offered is now provided by the ntpd daemon
itself. If you call ntpd with the command line option -q it will
retrieve the current time and set it accordingly.”

Please check the Network Time Protocol (NTP) daemon man page and
http://support.ntp.org/bin/view/Dev/DeprecatingNtpdate
for further information.

You can replace the ntpdate call with “rcntp ntptimeset” to achieve an
inital poll of the servers specified in /etc/ntp.conf.

The program /usr/sbin/sntp offers comparable functionality to ntpdate.
Specifically
sntp -P no -r pool.ntp.org
is equivalent to
ntpdate pool.ntp.org

For further details please refer to the man page of sntp.

[/QUOTE]
Hi
Ahh that will teach me to check the machine I’m on… :wink:

It does seem a bit hit and miss, try adding either -v or -V

bert:~ # sntp -V -P no -r pool.ntp.org
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= pool.ntp.org
sntp: offset=0.004+/-0.048 disp=0.030
sntp: correction 0.004 +/- 0.030+0.048 secs - ignored
bert:~ # sntp -v -P no -r pool.ntp.org
sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= pool.ntp.org
sntp: correction 0.004 +/- 0.030+0.049 secs - ignored
bert:~ # sntp -v -P no -r time-a.nist.gov
sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-a.nist.gov
sntp: correction -0.014 +/- 0.000+0.074 secs - ignored
bert:~ # sntp -P no -r time-a.nist.gov
bert:~ # sntp -v -P no -r time-a.nist.gov
sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-a.nist.gov
sntp: correction -0.003 +/- 0.000+0.055 secs - ignored
bert:~ # sntp -V -P no -r time-a.nist.gov
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-a.nist.gov
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: not enough valid responses received in time
bert:~ # sntp -V -P no -r time-a.nist.gov
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-a.nist.gov
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: not enough valid responses received in time
bert:~ # sntp -v -P no -r pool.ntp.org
sntp options: a=2 v=1 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= pool.ntp.org
sntp: correction 0.003 +/- 0.032+0.050 secs - ignored
bert:~ # sntp -V -P no -r pool.ntp.org
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= pool.ntp.org
sntp: offset=0.003+/-0.047 disp=0.032
sntp: correction 0.003 +/- 0.032+0.047 secs - ignored
bert:~ # sntp -V -P no -r time-a.nist.gov
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-a.nist.gov
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: not enough valid responses received in time
bert:~ # sntp -V -P no -r time-b.nist.gov
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= time-b.nist.gov
sntp: offset=-0.000+/-0.054 disp=0.000
sntp: correction -0.000 +/- 0.000+0.054 secs - ignored

–
Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop
up 4:01, 4 users, load average: 0.01, 0.03, 0.05
CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU

5

Hi,
the problem for me is that sntp try to use high ports and get timeouts. I was looking for alternative which uses only port 123.

server2:~ # sntp -V -P no -r LANtimeserver
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= LANtimeserver
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: receive timed out after 3 seconds
sntp: not enough valid responses received in time

server2:~ # sntp -V -P no -r pool.ntp.org
sntp options: a=2 v=2 e=0.100 E=5.000 P=2147483647.000
d=15 c=5 x=0 op=1 l=/etc/sntp.pid f= pool.ntp.org
sntp: offset=0.003+/-0.009 disp=0.023
sntp: correction 0.003 +/- 0.023+0.009 secs - ignored

I set up time sync with yast-> Network Services → NTP configuration now it seems working.