需要在/var/named/test.com文件中加入几行解释：
ad01 IN A 10.0.0.1
_ldap._tcp.dc._msdcs.test.com. 1H IN SRV 0 100 389 ad01.test.com.
_gc._tcp.dc._msdcs.test.com. 1H IN SRV 0 100 3268 ad01.test.com.
_kerberos._tcp.dc._test.com. 1H IN SRV 0 100 88 ad01.test.com.
_kpasswd._tcp.dc._test.com. 1H IN SRV 0 100 464 ad01.test.com.