NIS+ offers increased security at the RPC(3N) layer beyond 192 bit Diffie-Hellman (RPC(3N) security flavor AUTH_DES) using the RPCSEC_GSS RPC(3N) security flavor. See the nisauthconf(1M) command for a list of which security mechanisms are available on the system. Along with more stringent cryptographic strength, these security mechanisms also provide integrity for each NIS+ transaction. That is, the data for each NIS+ transaction is verified that it has not been modified.
System administraters can take advantage of the more stringent security mechanisms either by running nisauthconf(1M) before the NIS+ server environment is constructed or after, using the guidelines below.