Editing Split DNS Implementation for RDM by Gopal Krishan

[[category:RDM]]


= 9. Implementation of Split DNS =


== Main Configuration ==
 
Edit the file /etc/named.conf as follows and make sure internal and external view are created which I have marded in red.


vi /etc/named.conf

 <nowiki>###################################################################</nowiki>
 // named.conf for Red Hat caching-nameserver 
 //
 acl loc {127.0.0.1/8; 10.10.1.0/21; 10.10.2.0/21; 10.10.3.0/21; };
 options {
 directory "/var/named";
 dump-file "/var/named/data/cache_dump.db";
 statistics-file "/var/named/data/named_stats.txt";
 allow-query { loc;};
 allow-recursion { loc;};
 forwarders {202.56.240.5; 202.56.250.5; 4.2.2.2; };
 /*
 * 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 {
 inet 127.0.0.1 allow { localhost; } keys { rndckey; };
 };
 view "inside" {
 match-clients { loc; };
 recursion yes;
 zone "." IN {
 type hint;
 file "named.root";
 };
 zone "0.0.127.in-addr.arpa" IN {
 type master;
 file "named.local";
 allow-update { none; };
 };
 zone "rdm.co.in" IN {
 type master;
 file "rdm.co.in.int.zone";
 allow-update { none; };
 allow-query { any; };
 };
 zone "rdmindia.com" IN {
 type master;
 file "rdmindia.com.int.zone";
 allow-update { none; };
 allow-query { any; };
 };
 zone "rdmfamily.in" IN {
 type master;
 file "rdmfamily.in.zone";
 allow-update { none; };
 allow-query { loc; };
 };
 zone "1.10.10.in-addr.arpa" IN {
 type master;
 file "rdmfamily.in.local";
 allow-update { none; };
 allow-query { loc; };
 };
 zone "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.ip6.local";
 allow-update { none; };
 };
 zone "255.in-addr.arpa" IN {
 type master;
 file "named.broadcast";
 allow-update { none; };
 };
 zone "0.in-addr.arpa" IN {
 type master;
 file "named.zero";
 allow-update { none; };
 };
 };
 view "outside" {
 match-clients { !loc; any; };
 recursion no;
 zone "rdm.co.in" IN {
 type master;
 file "rdm.co.in.ext.zone";
 allow-update { none; };
 allow-query { any; };
 };
 zone "rdmindia.com" IN {
 type master;
 file "rdmindia.com.ext.zone";
 allow-update { none; };
 allow-query { any; };
 };
 zone "188.21.125.in-addr.arpa" IN {
 type master;
 file "rdm.co.in.local";
 allow-update { none; };
 allow-query { any; };
 };
 };
 include "/etc/rndc.key";
 Make entries in /var/named/chroot/var/named/.




== Internal Views ==



vi rdm.co.in.int.zone


 <nowiki>###########################################################</nowiki>
 $TTL 86400
 @ IN SOA dellc1.rdm.co.in. admin.rdm.co.in. (
  2008070201 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dellc.rdm.co.in. 
 IN NS dellc1.rdm.co.in. 
 rdm.co.in. IN A 10.10.1.9
 rdm.co.in. IN A 10.10.1.10
 mailserver.rdm.co.in.INA10.10.1.2
 sambaPDC.rdm.co.in.INA10.10.1.15
 sambaBDC.rdm.co.in.INA10.10.1.16
 dellcINA10.10.1.1
 dellc1INA 10.10.1.8
 wwwINA10.10.1.8
 wwwINA10.10.1.1
 ftpINCNAMEdellc.rdm.co.in.
 <nowiki>#######################################################################</nowiki>


vi rdmindia.com.int.zone

 <nowiki>######################################################################</nowiki>
 $TTL 86400
 @ IN SOA dellc1.rdm.co.in. admin.rdm.co.in. (
 2008060501 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dellc.rdm.co.in. 
 IN NS dellc1.rdm.co.in. 
 rdmindia.com. IN A 10.10.1.9 
 rdmindia.com. IN A 10.10.1.10
 ns.rdmindia.com.INA 10.10.1.8
 rdmindia.com.INNSns.rdmindia.com.
 ftpINCNAMEns.rdmindia.com.
 hrINA203.190.134.85
 dellc.rdm.co.in.INA10.10.1.8
 dellc1.rdm.co.in.INA10.10.1.1
 <nowiki>#####################################################################</nowiki>


vi rdmfamily.in.zone


 <nowiki>###################################################################</nowiki>
 $TTL 86400
 @ IN SOA dns1.rdm.co.in. admin.rdm.co.in. (
 2008060501 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dns1.rdm.co.in.
 IN NS dns2.rdm.co.in.
 rdmfamily.in. IN A 10.10.1.1
 rdmfamily.in. IN A 10.10.1.8
 ib.rdmfamily.in. IN A 10.10.2.250
 dns1.rdm.co.in. INA 10.10.1.1
 dns2.rdm.co.in. INA 10.10.1.8
 <nowiki>###########################################################################</nowiki>


vi rdmfamily.in.local


 <nowiki>#########################################################################</nowiki>

 $TTL 86400
 @ IN SOA dns1.rdm.co.in. admin.rdm.co.in. (
 2008051701 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dns1.rdm.co.in.
 IN NS dns2.rdm.co.in.
 1 IN PTR rdmfamily.in.
 8 IN PTR rdmfamily.in.
 250 IN PTR ib.rdmfamily.in.
 2 IN PTR mailserver.rdm.co.in.
 <nowiki>##########################################################################</nowiki>


== External views ==



vi rdm.co.in.ext.zone


 <nowiki>##########################################################################</nowiki>
 $TTL 86400
 @ IN SOA dellc1.rdm.co.in. admin.rdm.co.in. (
 2008070201 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dellc.rdm.co.in. 
 IN NS dellc1.rdm.co.in. 
 rdm.co.in. IN A 203.190.134.82
 rdm.co.in. IN A 125.21.188.210
 mail1.rdm.co.in.INA203.190.134.89
 mail2.rdm.co.in.INA125.21.188.210
 rdm.co.in. IN MX 1mail1.rdm.co.in.
 rdm.co.in. IN MX 10mail2.rdm.co.in.
 mailserver.rdm.co.in.INA203.190.134.83
 dellc IN A 203.190.134.82
 www IN A 203.190.134.82
 www IN A 125.21.188.210
 ftp IN CNAME dellc.rdm.co.in.
 www.rdm.co.in.INA203.190.134.82
 www.rdm.co.in.INA125.21.188.210
 dellc.rdm.co.in.INA203.190.134.82
 dellc1.rdm.co.in.IN A125.21.188.210
 <nowiki>###########################################################################</nowiki>


vi rdminida.com.ext.zone


 $TTL 86400
 @ IN SOA dellc1.rdm.co.in. admin.rdm.co.in. (
 2008060501 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dellc.rdm.co.in. 
 IN NS dellc1.rdm.co.in. 
 rdmindia.com. IN A 203.190.134.82
 rdmindia.com. IN A 125.21.188.210
 rdmindia.com.INMX1203.190.134.89.
 rdmindia.com.INMX10125.21.188.210.
 mailserver.rdm.co.in.INA203.190.134.83
 ns IN A 203.190.134.82
 ns.rdmindia.com.INA203.190.134.82
 rdmindia.com.INNSns.rdmindia.com.
 dellc IN A 203.190.134.82
 ftp IN CNAME ns.rdmindia.com.
 hr IN A 203.190.134.85
 intranet IN A 203.190.134.82
 projects IN A 220.227.149.66
 wap IN A 203.190.134.85
 dellc.rdm.co.in. IN A 203.190.134.82
 dellc1.rdm.co.in. IN A 125.21.188.210
 <nowiki>######################################################################</nowiki>


vi rdm.co.in.local


 <nowiki>###########################################################################</nowiki>
 $TTL 86400
 @ IN SOA dellc1.rdm.co.in. admin.rdm.co.in. (
 2008051701 ; Serial
 28800 <nowiki>; Refresh</nowiki>
 14400 <nowiki>; Retry</nowiki>
 3600000 <nowiki>; Expire</nowiki>
 86400 ) <nowiki>; Minimum</nowiki>
 IN NS dellc.rdm.co.in.
 IN NS dellc1.rdm.co.in.
 210 IN PTR rdmindia.com. 
 210 IN PTR dellc1.rdmindia.com. 
 210 IN PTR www.rdmindia.co.in. 
 210 IN PTR ns.rdmindia.com. 
 210 IN PTR rdm.co.in. 
 210 IN PTR dellc1.rdm.co.in. 
 210 IN PTR rdm.co.in.
 <nowiki>########################################################################</nowiki>