Configure DSN details

Configure DSN details-general Linux technology-Linux technology and application information. For more information, see. [Root @ localhost root] # vi/etc/named. conf ------ DNS master configuration file

// Generated by named-bootconf.pl

Options {------ global definition (Global Setting option, macro definition, can be considered as Constitution)
Directory "/var/named"; ------ define the directory of the server region configuration file as/var/named
/*
* If there is a firewall between you and nameservers you want
* To talk to, you might need to uncomment the query-source
* Directive below. Previous versions of BIND always asked
* Questions using port 53, but BIND 8.1 uses an unprivileged
* Port by default.
*/
// Query-source address * port 53;
};

//
// A caching only nameserver config
//

Controls {----- control definition, which can be understood as a special explanation of special issues, for example, the definition of the computer network security law
Inet 127.0.0.1 allow {localhost;} keys {rndckey;}; --- when the client initiates a request to the server (that is, the request to port 53 of the server ), it will trigger the server's named process. It is equivalent to entering a command in the shell environment. Then, through the 127.0.0.1 channel and port 953, get a rndckey (/etc/rndc. to access the database under/var/named.
};

Zone "." IN {----- zone definition (Region definition, partial definition, can be understood as the local method) IN: indicates that the network type is internet.
Type hint; ----- type is the root prompt, that is, the DNS boss, hint authoritative, top-level, implicit
File "named. ca"; ----- root cache database, root prompt, tell the DNS boss who is used to store the FQDN of 13 root servers and the corresponding IP Address
};

Zone "localhost" IN {
Type master; ---- indicates that the DNS type is primary DNS, and Slave secondary DNS
File "localhost. zone"; ---- name of the local forward database file, IP-domain name. Q: Do you know where this file is stored?
Allow-update {none ;}; ---- whether to allow this DNS to update to other DNS, none is not allowed here
};

Zone "0.0.127.in-addr. arpa" IN {---- the syntax is defined by arpa. The arpa network is the ancestor of the Internet! For example, the IP address range of 192.168.101.0 is 101.168.192.in-addr. arpa.
Type master; ---- indicates that the DNS type is secondary DNS.
File "named. local"; ---- name of the local reverse database file, domain name-IP.
Allow-update {none ;};
};

Zone "163.com" IN {----- custom region 163.com
Type master;
File "163.com ";
Allow-update {none ;};
};

Zone "11.168.192.in-addr. arpa" IN {
Type master;
File "192.168.11.rev ";
Allow-update {none ;};
};

Include "/etc/rndc. key ";