Computer Services offer an operating system clock synchronization service based on NTP. Our NTP servers list is the following
- ntp1.tecnico.ulisboa.pt
- 193.136.152.71
- 2001:690:2100:14::1
- ntp2.tecnico.ulisboa.pt
- 193.136.152.72
- 2001:690:2100:14::2
This is information is mainly directed to those who manually configure a computer servers, but it can be used on any device that supports this functionality. It is publicly available even outside IST computer network.
NTP servers configuration is also provided in our DHCP service along with IP network connectivity parameters.
This is an essential clock synchronization protocol used distributed systems, particularly those that implement security protocols or those which need to maintain time synchronized transactions.
pool.ntp.org
Our servers are part of NTP Pool Project. Given that most GNU/Linux distributions have a default configuration for ntpd to use the NTP servers on this project, it is likely that your device already uses our service if it is located in Portugal, or even Europe.
Nevertheless you can manually configure your Linux or Windows following their instructions .
If your device is located in Portugal and you want to have the smallest latency to portuguese NTP servers it is best to configure these NTP sources:
- 0.pt.pool.ntp.org
- 1.pt.pool.ntp.org
- 2.pt.pool.ntp.org
- 3.pt.pool.ntp.org