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. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1242307 Title: Doesn't report NTP connection problems Status in “gnome-control-center” package in Ubuntu: New Status in “indicator-datetime” package in Ubuntu: New Bug description: 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.. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1242307/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

