hesiod

Project Athena's DNS-based directory service - utilities
Hesiod is a name service library that can provide general name service
for a variety of applications. It is derived from BIND, the Berkeley
Internet Name Daemon, and leverages the existing DNS infrastructure of a
network. It is used on a number of university networks, including MIT
and Iowa State University.
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This package is only useful on networks that already use
Hesiod.