Implementation of CentOs DNS Functions

First, configure the linux network connection! 1. Install the relevant suite www.2cto.com [root @ localhost ~] # Yum-y install bind bind-chroot2, configure the experiment environment [root @ localhost ~] # Cd/var/named/chroot [root @ localhost chroot] # cp-rv/usr/share/doc/bind-9.3.6/sample/etc/var/[root @ localhost chroot] # cp-rv/usr/share/doc/bind-9.3.6/sample/etc/* etc/[root @ localhost chroot] # cp-rv/usr/share/doc/ bind-9.3.6/sample/var/* var/3. Configure related documents [root @ localhost ~] # Cd/var/named/chroot/etc [root @ localhost etc] # cp named. conf named. conf. bak [root @ localhost etc] # vi named. conf options {directory "/var/named"; // the default forwarders {202.102.240.65 ;}; (managed)}; zone "ethnicity.com" (positive solution) {type master; file "named. ethnicity ";}; zone" 1.168.192.in-addr. arpa "(reverse) {type master; file" 192.168.1.zone ";}; [root @ localhost ~] # Cd/var/named/chroot/var/named [root @ localhost named] # cp localhost. zone named. ethnicity [root @ localhost named] # cp localhost. zone 192.168.1.zone [root @ localhost named] # vi named. ethnicity $ TTL 86400 @ in soa @ root (42; serial (d. adams) 3 H; refresh 15 M; retry 1 W; expiry 1D); minimum in ns @ in mx 192 mail.ethnicity.com. ftp in a 192.168.1.192mail in a 192.168.1.192im in a 192.168.1.193c1 IN A 192.168.1.12c1 in a 192.168.1.13 [root @ localhost named] # vi 192.168.1.zone $ TTL 86400 @ in soa @ root (42; serial (d. adams) 3 H; refresh 15 M; retry 1 W; expiry 1D); minimum in ns @ 192 in ptr ftp. ethnicity. com192 in ptr mail. ethnicity. com193 in ptr im.ethnicity.com [root @ localhost named] #/etc/init. d/named restart4. Configure the Verification Environment (test in linux itself) [root @ localhost named] # vi/etc/resolv. conf; generated /Sbin/dhclient-scriptsearch ethnicity. comnameserver 192.168.1.1925. Verify [root @ localhost named] # nslookup> ftp. ethnicity. comServer: 192.168.1.192Address: 192.168.1.192 #53 Name: ftp. ethnicity. comAddress: 192.168.1.192> 192.168.1.193Server: 192.168.1.192Address: 192.168.1.192 #53 193.1.168.192.in-addr. arpa name = im.ethnicity.com. 1.168.192.in-addr. arpa.> mail. ethnicity. comServer: 192.168.1.192Address: 19 Route 1.192 #53 Name: mail. ethnicity. comAddress: 192.168.1.192> www. nyist. netServer: 192.168.1.192Address: 192.168.1.192 #53 Non-authoritative answer: Name: www. nyist. netAddress: 202.102.240.88> www. google. comServer: 192.168.1.192Address: 192.168.1.192 #53 Non-authoritative answer: www.google.com canonical name = www-g-com-chn.l.google.com.Name: www-g-com-chn.l.google.comAddress: 66.249.89.104> exit [Root @ localhost ~] # Dig-t MX mail.ethnicity.com (verify MX emblem: The domain name defined for the mail server); <> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_5.3 <>-t MX mail.ethnicity.com; global options: printcmd; Got answer:;-> HEADER <-opcode: QUERY, status: NOERROR, id: 8264; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0; question section:; mail.ethnicity.com. in mx; authority section: ethnicity.com. 86400 in soa ethnicity. Com. root.ethnicity.com. 42 10800 900 604800 86400; Query time: 3 msec; SERVER: 192.168.1.192 #53 (192.168.1.192); WHEN: Tue Feb 8 20:07:16 2011; msg size rcvd: 77 success! Finally, the term "SOA" indicates the authority of the area (taking the school's DNS as an example, the main DNS server of the school's homepage 202.102.240.88 is 202.102.240.65) NS lists a name server in the area (the name of this DNS server) PTR ing (positive) of domain name A to IP address ptr ip address to domain name ing (reverse) CNAME set alias MX emblem related to mail service