IPFW blocked my IPv6 NTP traffic

[elof2 at sentor.se]

On Tue, 1 Dec 2015, Matthew Seaman wrote:

> On 2015/12/01 15:05, Mark Felder wrote:
>> Notice how almost all of them are port 123 on both sides, but a few of
>> them are not. Why? The RFC says that NTP is supposed to be using port
>> 123 as both the source and destination port, but I clearly have
>> something happening on port 16205. Is something screwy with ntpd in
>> CURRENT?
>
> NTP not using port 123 as the source port usually indicates that it is
> behind a NAT gateway at the other end.  It's harmless and fairly common.

...or simply that it is a ntp *client* like ntpdate, and not a daemon.
Clients often use a random source port, while ntpd use source port 123.

/Elof