DNS server
Recursive parsing sends a request to the root server, which parses, and then caches the parsing record locally.
Iterative parsing sends a request to the root server. The root server gives you the IP of a subordinate server, and you parse it from this IP.
Parse the record:
A resolution of domain name A to IP
NS is used to specify which DNS server will resolve the domain name. Fill in the IP address or name of the resolution server.
MX mail records should be used as mail servers, and both An and MX records should be made.
Alias format for CNAME domain name: CMAKE
Set up DNS domain name server, for parsing, for caching
Install bind*
The configuration file is in / etc/named.conf
Dns uses a tcp/udp53 port
Listen-on port 53; listen-on-v6 port 53; allowbenefit query; all three lines are changed to any
/ etc/named.rfc1912.zones this is the main configuration file
To add a domain name, copy a zone
# add named by wugk
Zone "wugk.com" IN {
Type master
File "wugk.com.zone"
Allow-update {none;}
}
Zone "1.168.192.in-addr.arpa" IN {
Type master
File "wugk.com.arpa"
Allow-update {none;}
}
1) add the following files to the / var/named/ directory:
The contents of the Wugk.com.zone forward parsing file are as follows:
$TTL 86400
@ IN SOA ns.wugk.com. Root (
42; serial
3H; refresh
15m; retry
1W; expire
1D); minimum
@ IN NS ns.wugk.com.
Ns IN A 192.168.1.36
Bbs IN A 192.168.1.36
Www IN A 192.168.1.36
@ IN MX 10 mail.wugk.com.
Mail IN A 192.168.1.36
Ns is to mark you this is a DNS server, the front @ is to give a name to the ns server, @ is a zone, indicating ns.wugk.com. Is resolved to 192.168.1.24
Do not write @ or www in front of it, write it as *, then no matter what others access the prefix, it will resolve to this domain name.
The contents of the Wugk.com.arpa reverse parsing file are as follows:
$TTL 86400
@ IN SOA ns.wugk.com. Root (
42; serial
3H; refresh
15m; retry
1W; expire
1D); minimum
@ IN NS ns.wugk.com.
36 IN PTR mail.wugk.com.
36 IN PTR ns.wugk.com. Note that this one is about ns server.
36 IN PTR www.wugk.com.
What is written here is the last bit of IP. Generally, there is no reverse parsing in public network, so it is enough to write forward.
Then restart, / etc/init.d/named restart
Then change the client NDSip to 192.168.1.36 vim / etc/resolv.conf
You can ping www.wugk.com.
If you want to add another domain name
Nslookup www.baidu.com
Name NS server
IP parsed by Address
Name domain name
Address
Dig can see the parsing process.
