Setting DNS
mmencari paket DNS server (Bind9) yang tersedia pada cache
$ apt-cache search bind9
$ apt-get install bind9
Langkah awal adalah melakukan konfigurasi file hostname untuk memberi nama computer DNS
$ vi /etc/hostname
Misalnya computer DNS diberi nama V-DDNS
Kemudia konfigurasi file hosts
$ vi /etc/hosts
127.0.0.1 localhost.localdomain localhost V-DDNS ns
10.252.100.60 V-DDNS
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
langkah selanjutnya adalah melakukan konfigurasi file-file yang ada pada /etc/bind, file-file tersebut adalah sebagai berikut
-
named.conf ; penunjuk file konfigurasi (include)
-
named.conf.local ; konfigurasi IP & Nama Domain dari DNS
-
named.conf.options ; konfigurasi aturan DNS,forward & port
masih banyak lagi file-file konfigurasi DNS pada /etc/bind, namun file yang perlu dilakukan konfigurasi cukup 2 file, yaitu
-
named.conf.local
-
named.conf.options
$ vi /etc/bind/named.conf.local
//
// Do any local configuration here
//
// Consider adding the 1918 zones here, if they are not used in your
// organization
//include “/etc/bind/zones.rfc1918”;
zone “eightsun.net” IN {
type master;
file “/var/cache/bind/db.eightsun.net“;
allow-query {any;};
allow-transfer {127.0.0.1;};
};
//reverse
zone “100.252.10.in-addr.arpa” IN {
type master;
file “/var/cache/bind/db.10.252.100”;
};
Pada konfigurasi diatas adalah menunjuk file db.nguprex pada directory /var/cache/bind/ sebagai file konfigurasi DNS pada Domain
$ vi /etc/bind/named.conf.options
options {
directory “/var/cache/bind”;
// 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 and later use an unprivileged
// port by default.
query-source address * port 53;
// If your ISP provided one or more IP addresses for stable
// nameservers, you probably want to use them as forwarders.
// Uncomment the following block, and insert the addresses replacing
// the all-0’s placeholder.
forwarders {
0.0.0.0;
};
auth-nxdomain no; # conform to RFC1035
};
Selanjutnya adalah membuat file configurasi yang bernama db.nguprex dan db.10.252.100 seperti yang telah tercantum pada file named.conf.local di directory /etc/bind/
$ vi /var/cache/bind/db.eightsun.net
;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA ns.nguprex.net. root.eightsun.net. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
IN NS ns.eightsun.net.
IN MX 10 postfix.nguprex.net.
ns IN A 10.252.100.60
postfix IN A 10.252.100.25
apache IN A 10.252.100.80
proftpd IN A 10.252.100.21
samba IN A 10.252.100.22
dialproxy IN A 10.252.100.70
mail IN CNAME postfix
pop3 IN CNAME postfix
smtp IN CNAME postfix
imap IN CNAME postfix
www IN CNAME apache
fileserver IN CNAME samba
ftp IN CNAME proftpd
proxy IN CNAME dialproxy
$ vi /var/cache/bind/db.10.252.100
;
; BIND data file for local loopback interface
;
$TTL 604800
@ IN SOA ns.eightsun.net. root.eightsun.net. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; minimum
;
IN NS ns.eightsun.net.
IN MX 10 postfix.eightsun.net.
60 IN PTR ns.eightsun.net.
80 IN PTR apache.eightsun.net.
21 IN PTR proftpd.eightsun.net.
22 IN PTR fileserver.eightsun.net.
25 IN PTR postfix.eightsun.net.
70 IN PTR dialproxy.eightsun.net.
Setetlah melakukan konfgurasi file-file diatas maka DNS telah dapat bekerja, untuk melihat hasilnya lakukan restart service bind
$ /etc/ini.d/bind restart
$ vi /etc/resolv.conf
Di isi
nameserver IP_DNS_SERVER
nameserver 10.252.100.60
Setelah itu lihat hasilnya dengan perintah nslookup sebagai berikut
$ nslookup mail.nguprex.net
$ nslookup 10.252.100.60
$ nslookup 10.252.100.80
