Updating root zone file bind
There are two main options to BIND9 logging the channel option configures where logs go, and the category option determines what to log.Each zone file may contain directives and resource records.If you intend to serve a registered domain name they ensure that your DNS zone is still available even if your primary server is not online.You can even configure BIND9 to be a Caching and Primary Master DNS server simultaneously, a Caching and a Secondary Master server or even a Caching, Primary Master and Secondary Master server.But it doubles the number of requests made to the nameserver, thus making it an inefficient way to do so.
This increases security, by stopping the ability of an attacker to edit any of your master zone files if they do gain access as the bind user.
It's still a secondary, but it's not going to be asked about the zone you are serving to the internet from A and B If you configure your registered domain to use B and C as your domain's DNS servers, then A is a stealth primary.
Any additional records or edits to the zone are done on A, but computers on the internet will only ever ask B and C about the zone. You can create a CNAME record pointing to another CNAME record.
Directives are optional, but resource records are required to provide name service to a zone.
All directives and resource records should be entered on individual lines.
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It is not important whether these nameservers are slaves or if one is a master; they are both still considered authoritative. Neither Cent OS-5 nor the Cent OS Project are in any way affiliated with or sponsored by Red Hat®, Inc.