[ntp:questions] Problem syncing NTP behind NAT
hart at ntp.org
Fri Apr 6 03:27:41 UTC 2012
On Fri, Apr 6, 2012 at 02:38, Ken Link <klink at numberzero.org> wrote:
> Now I stop NTP on machine A and start NTP on machine B. The client
> request goes out the NAT, and I see the request coming into the
> external server with tcpdump. But, NTP on the external server doesn't
> respond. In fact, the debug from NTP doesn't even have a "receive"
> line for the request.
That's the key point. I don't know how you can expect ntpd to respond
to a packet it doesn't receive. There is some difference, probably to
be seen in comparing the tcpdump output, to explain why the request
never makes it to ntpd.
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