Server IP Address: 192.168.1.121 Hostname: newyork.example.com [root@newyork named]# vi /etc/sysconfig/network-scripts/ifcfg-eth0DEVICE=eth0 HWADDR=00:0c:29:a8:9e:61 NM_CONTROLLED=no ONBOOT=yes IPADDR=192.168.1.121 BOOTPROTO=none NETMASK=255.255.255.0 TYPE=Ethernet GATEWAY=192.168.1.1 IPV6INIT=no USERCTL=no[root@newyork named]# vi /etc/sysconfig/networkNETWORKING=yes HOSTNAME=newyork.example.com[root@newyork named]# service network restartShutting down interface eth0: [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: [ OK ][root@newyork ~]# yum install -y *bind* caching-nameserver [root@newyork ~]# ifconfig eth0eth0 Link encap:Ethernet HWaddr 00:0C:29:A8:9E:61 inet addr:192.168.1.121 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fea8:9e61/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:138 errors:0 dropped:0 overruns:0 frame:0 TX packets:184 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:13080 (12.7 KiB) TX bytes:29969 (29.2 KiB) Interrupt:19 Base address:0x2024[root@newyork ~]# cd /etc/ [root@newyork etc]# ll named* -rw-r----- 1 root named 930 Feb 15 2010 named.conf -rw-r--r-- 1 root named 601 May 26 2010 named.iscdlv.key -rw-r----- 1 root named 931 Jun 21 2007 named.rfc1912.zones named: total 0 [root@newyork etc]# cp named.conf named.conf.orig [root@newyork etc]# vi named.conf// // named.conf // // Provided by Red Hat bind package to configure the ISC BIND named(8) DNS // server as a caching only nameserver (as a localhost DNS resolver only). // // See /usr/share/doc/bind*/sample/ for example named configuration files. // options { listen-on port 53 { 192.168.1.121; }; # listen-on-v6 port 53 { ::1; }; directory "/var/named"; dump-file "/var/named/data/cache_dump.db"; statistics-file "/var/named/data/named_stats.txt"; memstatistics-file "/var/named/data/named_mem_stats.txt"; allow-query { any; }; recursion yes; dnssec-enable yes; dnssec-validation yes; dnssec-lookaside auto; /* Path to ISC DLV key */ bindkeys-file "/etc/named.iscdlv.key"; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; zone "." IN { type hint; file "named.ca"; }; include "/etc/named.rfc1912.zones";[root@newyork etc]# cp named.rfc1912.zones named.rfc1912.zones.orig [root@newyork etc]# vi named.rfc1912.zones// named.rfc1912.zones: // // Provided by Red Hat caching-nameserver package // // ISC BIND named zone configuration for zones recommended by // RFC 1912 section 4.1 : localhost TLDs and address zones // and http://www.ietf.org/internet-drafts/draft-ietf-dnsop-default-local-zones-02.txt // (c)2007 R W Franks // // See /usr/share/doc/bind*/sample/ for example named configuration files. // zone "example.com" IN { type master; file "forward.zone"; allow-update { none; }; }; zone "localhost" IN { type master; file "named.localhost"; allow-update { none; }; }; zone "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN { type master; file "named.loopback"; allow-update { none; }; }; zone "1.168.192.in-addr.arpa" IN { type master; file "reverse.zone"; allow-update { none; }; }; zone "0.in-addr.arpa" IN { type master; file "named.empty"; allow-update { none; }; };[root@newyork etc]# chgrp named named.conf [root@newyork etc]# cd /var/named/ [root@newyork named]# cp named.localhost forward.zone [root@newyork named]# cp named.loopback reverse.zone [root@newyork named]# vi forward.zone$TTL 1D @ IN SOA newyork.example.com. root.newyork.example.com. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum IN NS newyork.example.com. newyork IN A 192.168.1.121[root@newyork named]# vi reverse.zone$TTL 1D @ IN SOA newyork.example.com. root.newyork.example.com. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum IN NS newyork.example.com. 121 IN PTR newyork.example.com.[root@newyork named]# chgrp named forward.zone [root@newyork named]# chgrp named reverse.zone [root@newyork named]# vi /etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 192.168.1.121 newyork.example.com newyork[root@newyork named]# vi /etc/resolv.conf# Generated by NetworkManager search example.com nameserver 192.168.1.121 # No nameservers found; try putting DNS servers into your # ifcfg files in /etc/sysconfig/network-scripts like so: # # DNS1=xxx.xxx.xxx.xxx # DNS2=xxx.xxx.xxx.xxx # DOMAIN=lab.foo.com bar.foo.com[root@newyork named]# service named restartStopping named: [ OK ] Starting named: [ OK ][root@newyork named]# dig newyork.example.com; <<>> DiG 9.7.0-P2-RedHat-9.7.0-5.P2.el6 <<>> newyork.example.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1113 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;newyork.example.com. IN A ;; ANSWER SECTION: newyork.example.com. 86400 IN A 192.168.1.121 ;; AUTHORITY SECTION: example.com. 86400 IN NS newyork.example.com. ;; Query time: 1 msec ;; SERVER: 192.168.1.121#53(192.168.1.121) ;; WHEN: Wed Jan 16 11:26:32 2013 ;; MSG SIZE rcvd: 67[root@newyork named]# dig -x 192.168.1.121; <<>> DiG 9.7.0-P2-RedHat-9.7.0-5.P2.el6 <<>> -x 192.168.1.121 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57162 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 ;; QUESTION SECTION: ;121.1.168.192.in-addr.arpa. IN PTR ;; ANSWER SECTION: 121.1.168.192.in-addr.arpa. 86400 IN PTR newyork.example.com. ;; AUTHORITY SECTION: 1.168.192.in-addr.arpa. 86400 IN NS newyork.example.com. ;; ADDITIONAL SECTION: newyork.example.com. 86400 IN A 192.168.1.121 ;; Query time: 1 msec ;; SERVER: 192.168.1.121#53(192.168.1.121) ;; WHEN: Wed Jan 16 11:26:59 2013 ;; MSG SIZE rcvd: 107[root@newyork named]# nslookup newyork.example.comServer: 192.168.1.121 Address: 192.168.1.121#53 Name: newyork.example.com Address: 192.168.1.121[root@newyork named]# nslookup 192.168.1.121Server: 192.168.1.121 Address: 192.168.1.121#53 121.1.168.192.in-addr.arpa name = newyork.example.com.[root@newyork named]# chkconfig named --listnamed 0:off 1:off 2:off 3:off 4:off 5:off 6:off[root@newyork named]# chkconfig named on [root@newyork named]# chkconfig named --listnamed 0:off 1:off 2:on 3:on 4:on 5:on 6:off
Wednesday, January 16, 2013
How to Configure DNS Server in RHEL 6?
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