how do I change/add iSeries NTP server

Posted on 2011-10-31
Last Modified: 2013-12-06
I'm on V7R1M0, I want to set the iSeries to synchronize the system time with a NTP server.  but I can't seem to find a way to configure that anywhere.  I've tried it before with CHNGNTPA but it didn't seem to work.
Question by:moletech
    LVL 34

    Expert Comment

    by:Gary Patterson
    Ntp problems are typically firewall related. Is your firewall set up to allow inbound ntp udp packets?

    The problem is that ntp is a udp-based connectionless protocol. You send a request, and in a moment there is a response, but there is no association that the firewall can see between the two events. As a result you have to open up a wide range of udp ports to allow inbound ntp responses.
    LVL 26

    Accepted Solution

    ...but I can't seem to find a way to configure that anywhere.

    Configuration steps are in the i 7.1 Information Center. See Configuring SNTP for steps. You might also review Scenario: Synchronizing clocks with i5/OS for some general discussion and an example.

    But firewall setups will definitely need attention.


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