Win 2012 R2 and NTP over IPv6

[Enno Rey]

Hi,

did you play with the "w32tm" command?
It has a debug option and you can manually resync etc.

HTH,

Enno

On Wed, Jul 29, 2015 at 10:33:36AM +0200, Gert Doering wrote:
> Hi,
> 
> one of my colleagues just brought up a windows / ipv6 issue that I cannot
> answer (and google just returns "disable ipv6!" as the top#1 link...) -
> specifically, his server 2012 r2 is unable to sync to an IPv6-enabled
> NTP server.
> 
> I can see queries and responses:
> 
> 10:26:22.401681 IP6 2001:608:x:xx::zz.123 > 2001:608:0:c::123.123: NTPv3, Client, length 48
> 10:26:22.402150 IP6 2001:608:0:c::123.123 > 2001:608:x:xx::zz.123: NTPv3, Server, length 48
> 
> IPv6 connectivity is working fine - when pinging ntp.space.net, the server
> will happily acknowledge receipt of the echo replies.
> 
> Windows firewall is disabled (box is behind ACLs and the ACLs permit NTP), 
> so it really should be able to synchronize fine - but it doesn't.
> 
> So, before entering lenghty debug sessions, I'm hoping to hear from someone
> that this is a known issue, and all you need to do is "X" (or "it is known
> to not-work")...
> 
> Gert Doering
>         -- NetMaster
> -- 
> have you enabled IPv6 on something today...?
> 
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Enno Rey

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