On Tue, Jun 04, 2013 at 12:46:46PM -0400, Greg Troxel wrote:
>
> Basically, NTP (ntpd and ntpdate) assume that the mean of the outgoing
> and incoming local timestamps (in the local machine's time) is the same
> time as the mean of the remote machines incoming and outgoing timestamps
> (in the rem
tlaro...@polynum.com writes:
> On Tue, Jun 04, 2013 at 11:20:21AM +, Michael van Elst wrote:
>>
>> NTP doesn't use ICMP but UDP and client and servers exchange time
>> information directly within the NTP protocol. The gateway is
>> nothing more than a router in the path that causes some dela
On Tue, Jun 04, 2013 at 03:13:10PM +0200, Martin Husemann wrote:
>
> If your NAT device causes persistent enough packet handling delays in the
> order of 2 seconds (or enough to make NTP erroneously drift that far),
> you have a serious problem.
>[...]
> What timecounter source did your machine p
On Tue, Jun 04, 2013 at 03:05:21PM +0200, tlaro...@polynum.com wrote:
> The question arised because I have bad values (more than 2 seconds
> offset) for a node on which I have made a "ntpdate -b" (so no adjtime) a
> day before: the (new, dual-core x86_64, NetBSD 6.1) PC clock is not an
> atomic clo
On Tue, Jun 04, 2013 at 11:20:21AM +, Michael van Elst wrote:
>
> NTP doesn't use ICMP but UDP and client and servers exchange time
> information directly within the NTP protocol. The gateway is
> nothing more than a router in the path that causes some delay,
> with NAT or without.
>
OK. But
tlaro...@polynum.com writes:
>If I understand correctly, the time offset are computed taking into
>account the time the ICMP messages spent going from a time server to the
>client requesting it. But does a NAT rewrite happening in between have
>an impact on this computation? since both ends are u
Hello,
If I understand correctly, the time offset are computed taking into
account the time the ICMP messages spent going from a time server to the
client requesting it. But does a NAT rewrite happening in between have
an impact on this computation? since both ends are unaware of the
masquerading
