DNS service configuration and application 3-Linux Enterprise Application-Linux server application information. The following is a detailed description.
16. Reverse parsing of the region file: The following is an example of the/var/named/chroot/var/named/192.168.16.arpa file. $ Ttl 36000 16.168.192.in-addr. arpa. In soa dns.jackie.com. admin.jackie.com .( 2005090503 # Set SOA resource records 10800 3600 604800 36000) 16.168.192.in-addr. arpa. in ns dns.jackie.com. # Set NS resource records 177.16.168.192.in-addr. arpa. in ptr dns.jackie.com. 9 in ptr www.jackie.com. # Set pointer PTR resource records 178 in ptr mail1.jackie.com. # Set pointer PTR resource records 179 in ptr mail2.jackie.com. # Set pointer PTR resource records 180 in ptr mail3.jackie.com. # Set pointer PTR resource records 17. Load Balancing: You only need to add A resource record to the dns region file, for example: Ftp in a 192.168.1.1 Ftp in a 192.168.1.2 Ftp in a 192.168.1.3 18. achieve direct domain name resolution: Enter baidu.com and www.baidu.com to open the same web page function. Add A special A resource record, such Jackie.com in a 192.168.16.9 Or . In a 192.168.16.9 The two records are the same. 19. wildcard domain name resolution: All Hosts And subdomain names under a domain name are resolved to the same IP address. * .Jackie.com in a 192.168.16.9 Or * In a 192.168.16.9 The two records are the same. 20. Master name server test /Etc/rc. d/init. d/named start the named Process Pstree | grep "named" check whether the named process is started Vi/etc/resolv. conf The content is as follows: Domain jackie.com # Set the default domain name Nameserver 192.168.16.177 # Set the dns server address 21. Test with nslookup Program The nslookup program is the main test tool for dns services. The running mode is interactive and non-interactive. Non-interactive nslookup [-Option] query domain name [dns server address] Interactive nslookup [-dns server address] 22. The following uses the interactive mode as an example. Run the nslookup command to enter> prompt > Www.jackie.com > 192.168.16.179
> Set type = cname > Bbs.jackie.com
> Set type = mx > Jackie.com
> Set type = soa > Jackie.com
> Set type = NS > Jackie.com
> Set type = a # test the Server Load balancer > Ftp.jackie.com
> Set type = a # test direct domain name resolution > Jackie.com
> Set type = a # test the wildcard Domain Name > Ftp.jackie.com
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