If you have any kind of enterprise you should have an inhouse NTP server
that gets it's time from the closest ntp.org and point everything from the
storage devices, network switches, IBM i LPARs, windows clients, etc to it.
That way you are certain that everything is sync'ed.
If you have Active directory you usually sync to the PDC or equivalent,
since kerberos is picky with time for its auth tickets.
There's nothing wrong with pointing everything to ntp.org but the increased
traffic and having to allow those devices communication to the internet
might not be a good idea.


On Tue, Nov 19, 2019 at 12:42 PM Steinmetz, Paul via MIDRANGE-L <
midrange-l@xxxxxxxxxxxxxxxxxx> wrote:

Not directly related.
I was receiving TCP9110, did know why.
I had previous SNTP issues, caused by the time servers I was pointing to
were no longer valid.
I now use us.pool.ntp.org.
Is there a better choice?

Some interesting articles SNTP vs NTP.


https://www.streetdirectory.com/travel_guide/125508/computers/which_should_i_use_ntp_or_sntp.html

Paul




-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Rob
Berendt
Sent: Tuesday, November 19, 2019 10:20 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: NTP vs SNTP

No. Why? Is this related to this decision?

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com


-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Steinmetz, Paul via MIDRANGE-L
Sent: Tuesday, November 19, 2019 10:14 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Cc: Steinmetz, Paul <PSteinmetz@xxxxxxxxxx>
Subject: RE: NTP vs SNTP

CAUTION: This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and know
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Rob,

Did you receive a TCP9110 30 DIAGNOSTIC The maximum threshold for SNTP
Client errors has been reached?

Paul

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Rob
Berendt
Sent: Tuesday, November 19, 2019 10:07 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: NTP vs SNTP

I guess NTP vs SNTP is not a mission critical thing. After all, this
system was off by 3 minutes until last week when we noticed that it wasn't
communicating to the ntp server due to firewall issues. So if I mangle it
I can reverse it without too much issue, right? I may try it when I get a
few other things cleared off of my plate.

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com


-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Kevin Bucknum
Sent: Tuesday, November 19, 2019 9:55 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: NTP vs SNTP

CAUTION: This email originated from outside of the organization. Do not
click links or open attachments unless you recognize the sender and know
the content is safe.


There shouldn't be any difference. It is a client difference, not a
protocol difference. The server shouldn't care what the client is using. I
think anything running windows 10 is now NTP.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf
Of Rob Berendt
Sent: Tuesday, November 19, 2019 8:42 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: NTP vs SNTP

Apparently NTP is a new thing with 7.3 and above. It can be used instead
of SNTP as a client to keep your clocks in sync. I only discovered this
because I was using the webby IBM Navigator for i. Drilled down into TCP,
Servers and checked SNTP and tried to view Connection Status and it was
blank. Opened up a ticket. The support person had to look it up and get
back to me. Basically it will be blank unless you change your client type
from SNTP to NTP. He changed it on his system and then the connection
status screen was active.
It all sounds simple to me until I start worrying about if that will come
through different ports, etc on our firewall thus having to get numerous
network consultants from different companies involved (DMZ lpar). And if
there might be any required modifications on the SNTP servers to support
NTP. At this time I'm thinking not worth it. What say ye?

Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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[https://www.medtronsoftware.com/img/MedtronMinilogo.bmp] Kevin Bucknum
Senior Programmer Analyst
MEDDATA / MEDTRON
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