[NTLUG:Discuss] NTP Problems

terry trryhend at gmail.com
Thu Jun 12 08:31:26 CDT 2008


Try:
utpdate -u ip.of.time.server

-u 	 Specifies the use of an unprivileged port to send the packets
from. Useful when you are behind a firewall that blocks incoming
traffic to privileged ports, and you want to synchronize with hosts
beyond the firewall. A firewall is a system or machine that controls
the access from outside networks to a private network.


On Wed, Jun 4, 2008 at 10:43 AM, Michael Barnes <barnmichael at gmail.com> wrote:
> I have two ntp servers running, one on SUSE and one on Centos4.
> Clients cannot get time from the Centos4 server.
>
> ntp.conf on SUSE (rdserv)(working)
>
> restrict default nomodify
> restrict 127.0.0.1
> restrict 10.33.0.0  mask 255.255.0.0   nomodify notrap
> server 10.33.8.22 iburst
> server 0.pool.ntp.org
> server 1.pool.ntp.org
> server 2.pool.ntp.org
> driftfile /var/lib/ntp/drift/ntp.drift # path for drift file
> logfile /var/log/ntp            # alternate log file
>
>
> ntp.conf on Centos4 (bridge)(not working)
>
> restrict default nomodify
> restrict 127.0.0.1
> restrict 10.33.0.0  mask 255.255.0.0   nomodify notrap
> server 10.113.35.150 iburst
> logfile /var/log/ntpq
> driftfile /var/lib/ntp/drift
>
> When I try to get time from another client, I get
>
> srn-td-desk:~ # ntpdate bridge
>  4 Jun 10:28:57 ntpdate[3013]: no server suitable for synchronization found
> srn-td-desk:~ # ntpdate rdserv
>  4 Jun 10:29:04 ntpdate[3014]: adjust time server 10.33.8.16 offset 0.000948 sec
>
>
> Running netstat shows it is listening:
> bridge netstat (not working)
> udp        0      0 10.33.8.22:123                  0.0.0.0:*
> udp        0      0 10.113.35.100:123             0.0.0.0:*
> udp        0      0 127.0.0.1:123                    0.0.0.0:*
> udp        0      0 0.0.0.0:123                        0.0.0.0:*
> udp        0      0 fe80::20e:cff:fedc:f479:123   :::*
> udp        0      0 fe80::211:11ff:fe6f:123         :::*
> udp        0      0 ::1:123                               :::*
> udp        0      0 :::123                                 :::*
>
> rdserv netstat (working)
> udp        0      0 10.33.8.16:123          0.0.0.0:*
> udp        0      0 127.0.0.1:123            0.0.0.0:*
> udp        0      0 0.0.0.0:123                0.0.0.0:*
> udp        0      0 :::123                         :::*
>
>
> Any ideas on why I cannot put time from the Centos machine?
>
> Thanks,
> Michael
>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss
>



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