We created this tool on a project, this but it is a little rough.
NIS To LDAP Tool is often part of a Data Extraction Transformation process.
However, if the open source tools will not work for you, contact us to see if our tools can help.
The tool reads NIS directly from any client that can run Java 1.5 or better. Using JNDI to read NIS data and converts the data to an LDIF file for importing to LDAP.
An advantage of this method is that there is no need to export the NIS data as it is read live. We also have worked on a method for synchronization of the NIS data to LDAP.
We have used this tool on several large conversions of NIS to LDAP and it is very fast and so far works well.
There might be more information for this subject on one of the following: