Doesn't report NTP connection problems

[Tankypon]

Hi,
I'm using Ubuntu 13.04 64 bits. I have a problem with the indicator Date-Time.
I'm using the option "Automatically from the Internet" to retrieve the hour for my system, it's works fine on my home network. But when I use a public network, this function doesn't work properly. It's due to the limited allowed ports I believe. So what are ports using in the indicator Date-Time for retrieving the hour?

The most common port on a public network is just 80 (http port)

PS: I'm using a public network all weeks, so that's important for me because I want to know sometime the hour..

[Matthew Paul Thomas (mpt)]

Thanks for the report, Audiger. Ubuntu uses the standard NTP <http://en.wikipedia.org/wiki/Network_Time_Protocol> for its time checking. As mentioned both there and in <https://help.ubuntu.com/community/UbuntuTime#Troubleshooting>, NTP uses UDP on port 123. If a public network blocks this port, the public network is misconfigured.

That isn't the fault of indicator-datetime at all. But System Settings, and *possibly* indicator-datetime, could display that problem and currently don't.

[Tankypon (tankypon)]

Thank you for your answer.
I just want to add. I have a laptop which does not have his battery. I think it's why my laptop doesn't remember the hour.
So if I can pass on an other port (or something different) to retrieve the hour, I will have the correct hour when I switch on my computer. Because during all weeks, I'm on a public network (I'm living and studying in a building of my school).