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  3. May 2014

Re: NTP (not SNTP) on the System i ?

On 5/20/2014 9:18 PM, Vernon Hamberg wrote:
NTP vs SNTP - it's more than this skewing issue,
-snip-
The last RFC that was only SNTP was 4330 - that has been obsoleted by
5905. http://tools.ietf.org/html/rfc5905 is a place to look at it.
-snip-
The RFC, if I read it correctly, says that the only thing different is
the mitigation - so skewing is certainly available to SNTP, as Chuck
points out.

Anyhow, NTP on IBM i is SNTP according to RFC 2030, I think - a
predecessor of 4330. Same with the AIX version. Not sure about any Java
versions.

According to http://www-01.ibm.com/support/docview.wss?uid=nas8N1013598
(document N1013598), IBM i SNTP is indeed based on RCF2030, which is
quite old (SNTP V4). The document states that it refers to IBM i
versions 5.4.0, 5.4.5, 6.1.0, 6.1.1, 7.1.0. RFC2030 can be read here:
http://tools.ietf.org/html/rfc2030

--buck

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