Quick NTP Question

[ahoward12]

Hey Gents, I had a quick and most likely, easy question. I finished setting up NTP on my NNA server, however I kept running into small roadblocks I cannot find answers to, or maybe just need explained to me.

I found several forums and a couple Nagios posts that helped me setup NTP. Many of these posts referenced using ntpq -d. In this post https://support.nagios.com/forum/viewto ... tpq#p53678 . When I run ntpq -d I get Name or service known.

To me, this gets weirder...I'll just post some code with questions:

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[root@nagiosna ~]# ntpd -d
ntpd [email protected] Mon Feb  6 07:22:46 UTC 2017 (1)
12 Apr 10:04:52 ntpd[2265]: proto: precision = 0.110 usec
12 Apr 10:04:52 ntpd[2265]: 0.0.0.0 c01d 0d kern kernel time sync enabled
event at 0 0.0.0.0 c01d 0d kern kernel time sync enabled
Finished Parsing!!
restrict: op 1 addr 0.0.0.0 mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask :: mflags 00000000 flags 000005d0
restrict: op 1 addr 127.0.0.1 mask 255.255.255.255 mflags 00000000 flags 0000000                                                                                                                                                             0
restrict: op 1 addr ::1 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 0000                                                                                                                                                             0000 flags 00000000
restrict: op 1 addr 10.10.99.36 mask 255.255.255.255 mflags 00000000 flags 00000                                                                                                                                                             000
restrict: op 1 addr 10.10.99.0 mask 255.255.255.0 mflags 00000000 flags 00000000
restrict: op 1 addr 192.168.17.40 mask 255.255.255.255 mflags 00000000 flags 000                                                                                                                                                             00000
12 Apr 10:04:52 ntpd[2265]: ntp_io: estimated max descriptors: 1024, initial soc                                                                                                                                                             ket boundary: 16
12 Apr 10:04:52 ntpd[2265]: Listen and drop on 0 v4wildcard 0.0.0.0 UDP 123
12 Apr 10:04:52 ntpd[2265]: Listen and drop on 1 v6wildcard :: UDP 123
12 Apr 10:04:52 ntpd[2265]: Listen normally on 2 lo 127.0.0.1 UDP 123
restrict: op 1 addr 127.0.0.1 mask 255.255.255.255 mflags 00003000 flags 0000000                                                                                                                                                             1
12 Apr 10:04:52 ntpd[2265]: Listen normally on 3 eth0 10.10.99.36 UDP 123
restrict: op 1 addr 10.10.99.36 mask 255.255.255.255 mflags 00003000 flags 00000                                                                                                                                                             001
12 Apr 10:04:52 ntpd[2265]: Listen normally on 4 lo ::1 UDP 123
restrict: op 1 addr ::1 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 0000                                                                                                                                                             3000 flags 00000001
12 Apr 10:04:52 ntpd[2265]: Listen normally on 5 eth0 fe80::250:56ff:fe81:4e3f U                                                                                                                                                             DP 123
restrict: op 1 addr fe80::250:56ff:fe81:4e3f mask ffff:ffff:ffff:ffff:ffff:ffff:                                                                                                                                                             ffff:ffff mflags 00003000 flags 00000001
12 Apr 10:04:52 ntpd[2265]: Listening on routing socket on fd #22 for interface                                                                                                                                                              updates
key_expire: at 0 associd 44428
peer_clear: at 0 next 1 associd 44428 refid INIT
event at 0 10.10.99.40 8011 81 mobilize assoc 44428
newpeer: 10.10.99.36->10.10.99.40 mode 3 vers 4 poll 6 10 flags 0x101 0x1 ttl 0                                                                                                                                                              key 00000000
key_expire: at 0 associd 44429
peer_clear: at 0 next 2 associd 44429 refid INIT
event at 0 10.10.99.44 8011 81 mobilize assoc 44429
newpeer: 10.10.99.36->10.10.99.44 mode 3 vers 4 poll 6 10 flags 0x101 0x1 ttl 0                                                                                                                                                              key 00000000
key_expire: at 0 associd 44430
peer_clear: at 0 next 3 associd 44430 refid INIT
event at 0 192.168.17.40 8011 81 mobilize assoc 44430
newpeer: 10.10.99.36->192.168.17.40 mode 3 vers 4 poll 6 10 flags 0x101 0x1 ttl                                                                                                                                                              0 key 00000000
12 Apr 10:04:52 ntpd[2265]: 0.0.0.0 c016 06 restart
event at 0 0.0.0.0 c016 06 restart
12 Apr 10:04:52 ntpd[2265]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM
event at 0 0.0.0.0 c012 02 freq_set kernel 0.000 PPM
12 Apr 10:04:52 ntpd[2265]: 0.0.0.0 c011 01 freq_not_set
event at 0 0.0.0.0 c011 01 freq_not_set
transmit: at 1 10.10.99.36->10.10.99.40 mode 3 len 48
auth_agekeys: at 1 keys 1 expired 0
receive: at 1 10.10.99.36<-10.10.99.40 mode 4 len 48
event at 1 10.10.99.40 8024 84 reachable
clock_filter: n 1 off 0.011408 del 0.004754 dsp 7.945313 jit 0.000000
^C12 Apr 10:04:53 ntpd[2265]: ntpd exiting on signal 2

This appears though it's working! However,

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[root@nagiosna ~]# ntpstat
Unable to talk to NTP daemon. Is it running?

This says the daemon isn't working... Ok, I'll start it.

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[root@nagiosna ~]# service ntpd start
Starting ntpd:                                             [  OK  ]

Started, let's try ntpstat:

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[root@nagiosna ~]# ntpstat
synchronised to NTP server (10.10.99.40) at stratum 4
   time correct to within 1101 ms
   polling server every 64 s

It works too! Although, if I diagnose ntpd..This now looks like it's not working...

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[root@nagiosna ~]# ntpstat
synchronised to NTP server (10.10.99.40) at stratum 4
   time correct to within 1101 ms
   polling server every 64 s
[root@nagiosna ~]# ntpd -d
ntpd [email protected] Mon Feb  6 07:22:46 UTC 2017 (1)
12 Apr 10:06:54 ntpd[2479]: proto: precision = 0.130 usec
12 Apr 10:06:54 ntpd[2479]: 0.0.0.0 c01d 0d kern kernel time sync enabled
event at 0 0.0.0.0 c01d 0d kern kernel time sync enabled
Finished Parsing!!
restrict: op 1 addr 0.0.0.0 mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask 0.0.0.0 mflags 00000000 flags 000005d0
restrict: op 1 addr :: mask :: mflags 00000000 flags 000005d0
restrict: op 1 addr 127.0.0.1 mask 255.255.255.255 mflags 00000000 flags 00000000
restrict: op 1 addr ::1 mask ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff mflags 00000000 flags 00000000
restrict: op 1 addr 10.10.99.36 mask 255.255.255.255 mflags 00000000 flags 00000000
restrict: op 1 addr 10.10.99.0 mask 255.255.255.0 mflags 00000000 flags 00000000
restrict: op 1 addr 192.168.17.40 mask 255.255.255.255 mflags 00000000 flags 00000000
12 Apr 10:06:54 ntpd[2479]: ntp_io: estimated max descriptors: 1024, initial socket boundary: 16
12 Apr 10:06:54 ntpd[2479]: unable to bind to wildcard address 0.0.0.0 - another process may be running - EXITING

Above, we clearly saw it connected and synchronized.

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[root@nagiosna ~]# ntptrace 10.10.99.40
10.10.99.40: timed out, nothing received
***Request timed out

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[root@nagiosna ~]# ntpq -p 10.10.99.40
10.10.99.40: timed out, nothing received
***Request timed out

[root@nagiosna ~]# traceroute 10.10.99.40
traceroute to 10.10.99.40 (10.10.99.40), 30 hops max, 60 byte packets
1 cafarodc1.cafaroco.com (10.10.99.40) 0.324 ms * *

[root@nagiosna ~]# grep 123 /etc/services
ntp 123/tcp
ntp 123/udp # Network Time Protocol

Can you explain to me how ntpd diagnose shows it working when the service is stopped, but it works when I stop the service? Also It is clearly connect to my ntp server but I cannot ntptrace to it? I apologize in advance for vomiting all of this information. I tried to get as much information as possible before posting. I am on CentOS 6. I am certain I just don't know what I'm doing and need help please

I also attached a putty log and my ntp.conf.

[tgriep]

What I think happened, you started the ntpd daemon and while it was running, you tried to run it again manually with the -d debugging option which caused the failure.
You may want to look at the man page about the ntpd daemon.
http://doc.ntp.org/4.1.0/ntpd.htm

The ntpq utility program is used to monitor NTP daemon ntpd operations and determine performance.
If the ntpd daemon is not running at the IP address 10.10.99.40, it will fail as the command cannot poll the server.

As long as you start the ntpd service in the NNA server and enable it so start at boot, the server should keep time for you.

[ahoward12]

Ok, thank you for the time and clearing up! Closed case