System Administration Guide: Naming and Directory Services (FNS and NIS+)

Setting Up DNS Forwarding

To enable DNS forwarding capabilities on an NIS+ client:
  1. Login as superuser.

  2. Properly configure the hosts line in the /etc/resolve.conf file to read: hosts:nisplus dns files.

In this implementation of NIS, if a /etc/resolve.conf file exists on the server, ypstart automatically starts the ypserv daemon with the -d option to forward requests to DNS. (To stop forwarding to DNS, edit the /usr/lib/netsvc/yp/ypstart script to remove the -d option from the ypserv command. You must then reboot the machine.)