The authentication key updating dns
host settings
to generate the key, the key file and copy the 
view key information 
edit key file modification key information 
to modify the main configuration file, the key file path to add 
the domain configuration file update type update verification key into 
the remote transmitting the key to the test end 
reload
End test set
by the key authentication remotely update the host 
host test remotely update the results 
hi.test.com appear. Corresponding ip, the update is successful
.
dhcp + dns composed of dynamic DNS ddns
host-side
download dhcp 
dhcp join firewall mechanism
Set dhcp configuration file
Delete rows 27, 28 and 35 after the row content 
is added to modify the configuration file 
ip this domain and dns and dhcp open dns update function
ip pool settings 
using man to help find key auto-update feature 
added automatically update the content key 
to restart the service 
test side settings
change the host name game.test.com 
Note ---> domain name test.com add content can arbitrarily change the front, test.com domain name can not be changed
dhcp mode set the NIC to 
restart the network 
test 
can be automatically and dynamically resolve the domain name
host-side
change ip pool 
dhcp restart the 
test side set up
a test 
has automatic dynamic domain name resolved