On 2016-07-10 20:37, Bob Williams wrote:
On 10/07/16 15:28, James Knott wrote:
On 07/10/2016 09:35 AM, Per Jessen wrote:
If you're not using NTP or some other time setting method, then it's just whatever you set your time to. It is possible for a DHCP server to point to an NTP server, but I don't know if openSUSE responds to that. It does, the server is added dynamically.
I suspected as much, but never verified. I suppose if a server is specified the DHCP provided server is not used.
It's also possible to use NTP multicast but, again, I don't know if openSUSE can use it. NTP can use it, no probs.
Again, I suspected as such but have not seen any info about this.
There are many things that may be available in openSUSE, but are apparently not documented.
One thing Bob could do is fire up Wireshark and filter on NTP to see what's happening. I normally configure my computers to use either my firewall/router or a public server. There are plenty of those around. Incidentally, the University of Toronto has a pair of NTP servers tick.utoronto.ca and tock.utoronto.ca. ;-)
Sorry to take so long to reply; I've been trying the various suggestions in this thread (and watching Andy Murray win at Wimbledon).
It took me a while to Wireshark working usefully, it's not something I'm familiar with. Anyway, I was able to ascertain the following.
1. YaST accepts my router address as an ntp server and says that it is reachable and responds correctly.
Ah. It is then a question of people testing their routers to see which work and which don't. Mine it seems not: ============================================================================== Telcontar:~ # rcntp status remote refid st t when poll reach delay offset jitter ============================================================================== LOCAL(0) .LOCL. 10 l 30 64 1 0.000 0.000 0.000 *AmonLanc.valino 5.196.160.139 3 u 19 64 1 0.121 0.108 0.095 hora.ngn.rima-t 172.20.47.7 5 u 28 64 1 13.553 -0.073 0.000 router.valinor .INIT. 16 u - 64 0 0.000 0.000 0.000 <==== oldrouter.valin .INIT. 16 u - 64 0 0.000 0.000 0.000 <==== ntp.redimadrid. 193.147.107.33 2 u 25 64 1 21.226 -0.419 0.000 masip.celingest .INIT. 16 u - 64 0 0.000 0.000 0.000 dnscache-madrid 140.203.204.77 2 u 23 64 1 14.441 -9.085 0.000 bwntpz.bluewin. 195.186.133.100 2 u 22 64 1 56.994 -8.239 0.000 dalek.roflcopte 195.83.222.27 2 u 21 64 1 32.272 0.469 0.000 ns0.luns.net.uk 158.43.192.66 2 u 20 64 1 51.795 3.369 0.000 static-21.herco 158.227.98.15 2 u 19 64 1 49.730 -8.368 0.000 monitordns.tbw. 195.186.11.242 2 u 18 64 1 47.289 -3.079 0.000 oods.roflcopter 195.83.222.27 2 u 17 64 1 32.220 0.328 0.000 time.videxio.ne 131.188.3.223 2 u 16 64 1 52.460 -3.166 0.000
2. After any configuration change, YaST wants to install SuSEfirewall, which means removing shorewall, which I don't want to do.
Block SuSEfirewall, set to never install, whatever the wording is. Yes, YaST accepting other firewalls is something that should be done in the near future.
3. Wireshark shows no ntp activity after closing (with 'Cancel') YaST.
Cancel aborts.
4. sudo systemctl restart ntpd.service works, and immediately generates traffic in Wireshark, but it only shows traffic from my machine to the router, no responses in the other direction.
Try as I do above. -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)