+100 for use Hesiod. It solved this problem well and correctly years ago, and just works. (It was also a key part of the support for Carnegie-Mellon's Andrew networked filesystem.)
The seamless integration of all the Project Athena stuff (Hesiod, Kerberos, etc.) with DEC Ultrix is one of many reasons that Ultrix is still, IMO, the greatest Unix/;Unix-like distro in history.
The seamless integration of all the Project Athena stuff (Hesiod, Kerberos, etc.) with DEC Ultrix is one of many reasons that Ultrix is still, IMO, the greatest Unix/;Unix-like distro in history.