ntpdate [3912]: Es wurde kein Server gefunden, der für die Synchronisation geeignet ist

Ich habe ntpd auf einer CentOs-Installation mit einer einfachen /etc/ntp.conf mit nur 3 Zeilen konfiguriert:

server 0.pool.ntp.org server 1.pool.ntp.org server 2.pool.ntp.org server 192.168.1.1 

Ungeachtet des Hosts, gegen den ich laufe, kann ich ntpdate nicht mit einem externen Server synchronisieren. Hier ist die Debug-Ausgabe, die ich bekomme, wenn ich sie starte:

[root@myhost superuser]# ntpdate -d pool.ntp.org 3 May 12:23:31 ntpdate[3912]: ntpdate 4.2.4p8@1.1612-o Fri Feb 22 11:23:28 UTC 2013 (1) Looking for host pool.ntp.org and service ntp host found : 173.44.32.10 transmit(173.44.32.10) transmit(69.41.163.31) transmit(18.85.44.118) transmit(65.182.144.36) transmit(173.44.32.10) transmit(69.41.163.31) transmit(18.85.44.118) transmit(65.182.144.36) transmit(173.44.32.10) transmit(69.41.163.31) transmit(18.85.44.118) transmit(65.182.144.36) transmit(173.44.32.10) transmit(69.41.163.31) transmit(18.85.44.118) transmit(65.182.144.36) transmit(173.44.32.10) transmit(69.41.163.31) transmit(18.85.44.118) transmit(65.182.144.36) 173.44.32.10: Server dropped: no data 69.41.163.31: Server dropped: no data 18.85.44.118: Server dropped: no data 65.182.144.36: Server dropped: no data server 173.44.32.10, port 123 stratum 0, precision 0, leap 00, trust 000 refid [173.44.32.10], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 transmit timestamp: d52e6306.7c9cb981 Fri, May 3 2013 12:23:34.486 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 69.41.163.31, port 123 stratum 0, precision 0, leap 00, trust 000 refid [69.41.163.31], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 transmit timestamp: d52e6306.afcfee21 Fri, May 3 2013 12:23:34.686 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 18.85.44.118, port 123 stratum 0, precision 0, leap 00, trust 000 refid [18.85.44.118], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 transmit timestamp: d52e6306.e3031a51 Fri, May 3 2013 12:23:34.886 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 65.182.144.36, port 123 stratum 0, precision 0, leap 00, trust 000 refid [65.182.144.36], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 originate timestamp: 00000000.00000000 Thu, Feb 7 2036 1:28:16.000 transmit timestamp: d52e6307.16364db7 Fri, May 3 2013 12:23:35.086 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  3 May 12:23:36 ntpdate[3912]: no server suitable for synchronization found