For most flavors of Unix this information will belong in /etc/ntp.conf, check your local documentation to be sure.
Our campus NTP server pool is ntp-pool.bu.edu.
If you require an IP Address, please submit a ticket at www.bu.edu/tech/contact
We recommend that you use our campus NTP servers for your time needs. Our servers are rigorously maintained and synchronize with a variety of external time sources which are chosen based on geographic location, clock accuracy, and redundancy of network paths over both the Internet and Internet-2.
NTP comes preconfigured on BU systems.
BU NTP servers are not available to systems off-campus.