From Free IPA

The slapi-nis plugin provides an NIS listener for the Directory Server that can respond to NIS requests for a number of different maps.

To enable this in IPA:

ipa-compat-manage enable
ipa-nis-manage enable
service restart rpcbind
service restart dirsrv

I do a quick smoke test with:

ypcat -h ipa.example.com -d example.com passwd

The only maps configured by default are:

• passwd
• group
• netgroup

Other maps are left as an exercise for the user but the NIS support is not meant to replace a full NIS server, just to provide a reasonable solution during migration from NIS to IPA.