CentOS 5.3 VM, trouble with ntpd, no server suitable for synchronization found
Hello -
I cant get ntpd to synchronize with the ntp servers. I have a CentOS 5.3 32 bit Virtual Machine. I'm in USA on Pacific Standard Time. Here's all configuration and other important information for troubleshooting. Is there anything wrong with my config? btw, I used wireshark to look at the UDP packets - I dont get any responses from any of the servers back. I only see requests going out from my server, but no response. Is this a firewall Issue? If it is, then do I need to just enable UDP port 123 on the firewall? ************ uname -a ************ Linux CCSLINUXVM 2.6.18-128.1.6.el5 #1 SMP Wed Apr 1 09:19:18 EDT 2009 i686 i686 i386 GNU/Linux ************ cat /etc/redhat-release ************ CentOS release 5.3 (Final) ************ cat /boot/grub/grub.conf ************ # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/sda3 # initrd /initrd-version.img #boot=/dev/sda default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.18-128.1.6.el5) root (hd0,0) kernel /vmlinuz-2.6.18-128.1.6.el5 ro root=LABEL=/ clocksource=acpi_pm divider=10 initrd /initrd-2.6.18-128.1.6.el5.img title CentOS (2.6.18-92.1.22.el5) root (hd0,0) kernel /vmlinuz-2.6.18-92.1.22.el5 ro root=LABEL=/ initrd /initrd-2.6.18-92.1.22.el5.img title CentOS (2.6.18-92.el5) root (hd0,0) kernel /vmlinuz-2.6.18-92.el5 ro root=LABEL=/ initrd /initrd-2.6.18-92.el5.img ************ cat /etc/ntp/step-tickers ************ #0.vmware.pool.ntp.org #1.vmware.pool.ntp.org 0.us.pool.ntp.org 1.us.pool.ntp.org 2.us.pool.ntp.org 3.us.pool.ntp.org ************ cat /etc/ntp.conf ************ # The configuration directive tinker panic 0 instructs NTP not to give up if it sees a # large jump in time. This is important for coping with large time drifts and also resuming virtual machines # from their suspended state. tinker panic 0 # Permit time synchronization with our time source, but do not # permit the source to query or modify the service on this system. restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer noquery # Permit all access over the loopback interface. This could # be tightened as well, but to do so would effect some of # the administrative functions. restrict 127.0.0.1 restrict -6 ::1 # Hosts on local network are less restricted. #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap # Use public servers from the pool.ntp.org project. # Please consider joining the pool (http://www.pool.ntp.org/join.html). server 0.us.pool.ntp.org iburst server 1.us.pool.ntp.org iburst server 2.us.pool.ntp.org iburst server 3.us.pool.ntp.org iburst #broadcast 192.168.1.255 key 42 # broadcast server #broadcastclient # broadcast client #broadcast 224.0.1.1 key 42 # multicast server #multicastclient 224.0.1.1 # multicast client #manycastserver 239.255.254.254 # manycast server #manycastclient 239.255.254.254 key 42 # manycast client # Undisciplined Local Clock. This is a fake driver intended for backup # and when no outside source of synchronized time is available. # Amit:07/01/2009:Commented these # It is also important not to use the local clock as a time source, often referred to as the Undisciplined # Local Clock. NTP has a tendency to fall back to this in preference to the remote servers when there is a # large amount of time drift. #server 127.127.1.0 # local clock #fudge 127.127.1.0 stratum 10 # Drift file. Put this in a directory which the daemon can write to. # No symbolic links allowed, either, since the daemon updates the file # by creating a temporary in the same directory and then rename()'ing # it to the file. driftfile /var/lib/ntp/drift # Key file containing the keys and key identifiers used when operating # with symmetric key cryptography. keys /etc/ntp/keys # Specify the key identifiers which are trusted. #trustedkey 4 8 42 # Specify the key identifier to use with the ntpdc utility. #requestkey 8 # Specify the key identifier to use with the ntpq utility. #controlkey 8 ************ ntpq -pn ************ remote refid st t when poll reach delay offset jitter ============================================================================== 129.174.93.11 .INIT. 16 u - 1024 0 0.000 0.000 0.000 207.171.30.106 .INIT. 16 u - 1024 0 0.000 0.000 0.000 209.123.234.24 .INIT. 16 u - 1024 0 0.000 0.000 0.000 67.43.164.196 .INIT. 16 u - 1024 0 0.000 0.000 0.000 ************ cat /etc/ntp/keys ************ # # PLEASE DO NOT USE THE DEFAULT VALUES HERE. # #65535Makey #1Mpass ************ cat /etc/ntp/ntpservers ************ #This file contains a list of ntp servers to show in the system-config-date user interface. #It is not recommended that you modify this file by hand. 0.centos.pool.ntp.org 1.centos.pool.ntp.org 2.centos.pool.ntp.org ************ /etc/init.d/ntpd restart ************ Shutting down ntpd: [ OK ] ntpd: Synchronizing with time server: [FAILED] Starting ntpd: [ OK ] ************ Output of /var/log/messages when I restart ntpd ************ Jan 7 22:33:18 localhost ntpd[19891]: ntpd exiting on signal 15 Jan 7 22:33:28 localhost ntpdate[26379]: no server suitable for synchronization found Jan 7 22:33:28 localhost ntpd[26381]: ntpd 4.2.2p1@1.1570-o Thu Apr 9 12:54:22 UTC 2009 (1) Jan 7 22:33:28 localhost ntpd[26382]: precision = 1.000 usec Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface wildcard, 0.0.0.0#123 Disabled Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface wildcard, ::#123 Disabled Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface lo, ::1#123 Enabled Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface eth0, fe80::20c:29ff:fe71:97e#123 Enabled Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface lo, 127.0.0.1#123 Enabled Jan 7 22:33:28 localhost ntpd[26382]: Listening on interface eth0, 192.1.32.108#123 Enabled Jan 7 22:33:28 localhost ntpd[26382]: kernel time sync status 0040 Jan 7 22:33:31 localhost ntpd[26382]: frequency initialized 0.000 PPM from /var/lib/ntp/drift ************ ntpdate -d 0.us.pool.ntp.org ************ 7 Jan 23:31:04 ntpdate[27575]: ntpdate 4.2.2p1@1.1570-o Thu Apr 9 12:54:23 UTC 2009 (1) Looking for host 0.us.pool.ntp.org and service ntp host found : tssnet1.tss.net transmit(66.7.96.2) transmit(63.240.161.99) transmit(72.167.54.201) transmit(66.7.96.2) transmit(63.240.161.99) transmit(72.167.54.201) transmit(66.7.96.2) transmit(63.240.161.99) transmit(72.167.54.201) transmit(66.7.96.2) transmit(63.240.161.99) transmit(72.167.54.201) transmit(66.7.96.2) transmit(63.240.161.99) transmit(72.167.54.201) 66.7.96.2: Server dropped: no data 63.240.161.99: Server dropped: no data 72.167.54.201: Server dropped: no data server 66.7.96.2, port 123 stratum 0, precision 0, leap 00, trust 000 refid [66.7.96.2], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 originate timestamp: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 transmit timestamp: cef15dbc.648f2170 Thu, Jan 7 2010 23:31:08.392 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 server 63.240.161.99, port 123 stratum 0, precision 0, leap 00, trust 000 refid [63.240.161.99], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 originate timestamp: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 transmit timestamp: cef15dbc.9cf6cefe Thu, Jan 7 2010 23:31:08.613 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 server 72.167.54.201, port 123 stratum 0, precision 0, leap 00, trust 000 refid [72.167.54.201], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 originate timestamp: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 transmit timestamp: cef15dbc.caf0cfe1 Thu, Jan 7 2010 23:31:08.792 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 7 Jan 23:31:09 ntpdate[27575]: no server suitable for synchronization found |
Go with that thought, if you're not seeing any return traffic you do have an issue external to the server
cheers |
All times are GMT -5. The time now is 03:24 AM. |