Time synchronization

Recommendations for NTP configuration 
 For stratus.a.acnca.pt use the CNCA provided NTP servers: 
 server ntp01.a.acnca.pt
server ntp02.a.acnca.pt
 
 For stratus.d.acnca.pt use the CNCA provided NTP servers: 
 server ntp01.d.acnca.pt
server ntp02.d.acnca.pt
 
 To use other NTP servers configure them as "peer" not "server" like: 
 peer ntp02.oal.ul.pt
peer ntp04.oal.ul.pt
peer ntp01.fccn.pt
peer ntp02.fccn.pt