[ntp:questions] Need help on NTP client
MAYER Hans
mayer at iiasa.ac.at
Mon Jul 27 09:43:07 UTC 2015
Hi Gao,
Could you fix the issue in the meantime ?
What I am missing is a line like this:
restrict source nomodify nopeer notrap
// Hans
-----Original Message-----
From: questions [mailto:questions-bounces+mayer=iiasa.ac.at at lists.ntp.org] On Behalf Of Gao
Sent: Wednesday, July 22, 2015 7:29 PM
To: questions at lists.ntp.org
Subject: [ntp:questions] Need help on NTP client
Hello list,
I have a local NTP server setup in my office LAN. It is a CentOS6 VM. On the server ntpd works fine. Now I build a new CentOS7 server and it can't sync with any of the NTP server, including my local server.
Here is my local NTP server(ovpn.sjv.lan, IP:192.168.123.46):
[root at ovpn ~]# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
+ntp1.torix.ca .PPS. 1 u 53 1024 377 68.759 -0.453 11.657
*ntp2.torix.ca .PPS. 1 u 699 1024 377 72.491 3.638 0.412
+69.28.67.44 18.26.4.105 2 u 101 1024 357 64.888 -1.005 2.151
-euro-shared.oln 142.3.100.2 2 u 621 1024 377 100.648 15.585 11.371
LOCAL(0) .LOCL. 10 l 18h 64 0 0.000 0.000 0.000
[root at ovpn ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:123
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp spt:123
###############################################
Now the new installed CentOS7(test.sjv.lan):
firewalld and SELinux has been disabled.
[root at test log]# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
ovpn.sjv.lan .INIT. 16 u - 64 0 0.000 0.000 0.000
kirdu.smartacti .INIT. 16 u - 64 0 0.000 0.000 0.000
ntp3.torix.ca .INIT. 16 u - 64 0 0.000 0.000 0.000
euro-shared.oln .INIT. 16 u - 64 0 0.000 0.000 0.000
bitdonut.co .INIT. 16 u - 64 0 0.000 0.000 0.000
[root at test log]# cat /etc/ntp.conf | egrep -v "(^#.*)"
driftfile /var/lib/ntp/drift
restrict default nomodify notrap nopeer noquery
restrict 127.0.0.1
restrict ::1
server ovpn.sjv.lan iburst
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
disable monitor
[root at test log]# ntpdate -q ovpn.sjv.lan server 192.168.123.46, stratum 2, offset -5.304602, delay 0.02580
22 Jul 10:24:37 ntpdate[12081]: step time server 192.168.123.46 offset
-5.304602 sec
################################################
I don't know what to do. I tried to turn off firewall on both nodes. The "ntpq -p" just wont show me any sign of reach the servers, both local and public.
Please help.
Gao
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