Adding a Slave DNS Server
The Internet would be an unpleasant place without slave servers. Slaves receive their data directly from a master DNS server, from a slave receiving data directly from a master, or maybe even from something more removed than that. Thus, you can control a large number of slaves by administering a single master.
The process of receiving that data is called a zone transfer. Zone transfers happen automatically when either of the following two events occurs:
The zone's refresh time is exceeded (the refresh time is the second number in the zone data file's SOA list).
The slave is listed as an NS server in the referring master or slave's zone data record, and neither the zone in named.conf nor the options section contains a ...
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