[ntp:questions] Thoughts on KOD

[Harlan Stenn]

Folks,

I was chatting with PHK about:

 http://support.ntp.org/bin/view/Dev/NtpProtocolResponseMatrix

 http://bugs.ntp.org/show_bug.cgi?id=2367

and how we probably want to extend KOD coverage to more than just the
"limited" case.

I was assuming folks would want finer-grained control over this
behavior, and thought about being able to choose any of kod-limited,
kod-noserve, and kod-query.

PHK suggested that we consider going the other way - KOD would mean
"Send KODs whenever appropriate".

I wonder what the costs/benefits will be when weighing the extra
complexity of "multiple choices" against "when the defaults change and
we get new behavior that we can't tune, that costs us in X and Y."

This gets a bit more complicated when taking into consideration:

- we'll get more traffic from a NAT gateway
- - do we need to be able to configure a threshhold for this case?

- we should pay attention to how a client, whom we find to be abusive,
  reacts to: 
- - getting no response
- - getting a KOD response
  and adapt accordingly.

Discussion appreciated.
-- 
Harlan Stenn <stenn at ntp.org>
http://networktimefoundation.org  - be a member!