System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP)

Enabling DNS With LDAP

If you want to enable DNS by setting up a /etc/resolv.conf file, add DNS to your hosts lines as shown below.

hosts:      ldap dns [NOTFOUND=return] files

The recommended configuration is:

hosts: files dns

ipnodes: files dns

If per-user authentication is used, the sasl/GSSAPI and Kerberos mechanisms expect the dns naming service to be configured and enabled. See the chapters on DNS in this administration guide for further details.