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Setting up DNS Server (bind9)

This section describes how to setup DNS server in Ubuntu 12.04 using bind9.

Login as root to system and follow below steps

  1. Remove bind9 if present
    apt-get remove bind9
    apt-get --purge remove bind9
    rm -rf /etc/bind
  2. Install bind9
    apt-get install bind9
  3. Lets say static ip will be used for system, and also lets hard-code dns servers for system. So you need to modify /etc/network/interface file. The file should look as below.
    iface lo inet loopback


    auto eth0
    iface eth0 inet static
    address 192.168.1.100
    netmask 255.255.255.0
    gateway 192.168.1.1
    network 192.168.1.0
    broadcast 192.168.1.255
    dns-nameservers 192.168.1.100 127.0.0.1 8.8.8.8
  4. You need to setup managed as false in network manager config file. Go to /etc/NetworkManager/NetworkManager.conf file.
    The file /etc/NetworkManager/NetworkManager.conf should look as below.
    [main]
    plugins=ifupdown,keyfile


    no-auto-default=38:60:77:93:0D:42,


    [ifupdown]
    managed=true

    Please note that for no-auto-default, you have to put your system MAC address.

  5. You need to setup your /etc/bind/named.conf file. In this particular example, we are planning to setup domain as group1-imslab11.in. Under that domain, we are planning to have 3 hosts pcscf, icscf and scscf. If you follow this example properly, at the end of this example, you can ping to
    group1-imslab11.in
    pcscf.group1-imslab11.in
    scscf.group1-imslab11.in
    icscf.group1-imslab11.in


    Now add/modify the named.conf file should look as below.
    // This is the primary configuration file for the BIND DNS server named.
    //
    // Please read /usr/share/doc/bind9/README.Debian.gz for information on the
    // structure of BIND configuration files in Debian, *BEFORE* you customize
    // this configuration file.
    //
    // If you are just adding zones, please do that in /etc/bind/named.conf.local



    include "/etc/bind/named.conf.options";
    include "/etc/bind/named.conf.local";
    include "/etc/bind/named.conf.default-zones";
    include "/etc/bind/zones.rfc1918";
    include "/etc/bind/rndc.key";


    controls {
    inet 127.0.0.1 port 953
    allow {127.0.0.1;} keys {"rndc-key";};
    };


    zone "group1-imslab11.in" {
    type master;
    file "/etc/bind/open-ims.dnszone";
    notify no;
    };


    zone "1.168.192.in-addr.arpa" IN {
    type slave;
    file "/etc/bind/open-ims-rev.dnszone";
    allow-query {any;};
    masters {192.168.1.100;};
    notify no;
    };
  6. Now the forward zone file (oen-ims.dnszone) should look as below.
    $ORIGIN group1-imslab11.in.
    $TTL 1W
    @ 1D IN SOA group1-imslab11.in. root.group1-imslab11.in. (
    2006101001 ; serial
    3H ; refresh
    15M ; retry
    1W ; expiry
    1D ) ; minimum
    1D IN NS necs04.group1-imslab11.in.

    pcscf 1D IN A 192.168.1.100
    _sip.pcscf 1D SRV 0 0 4060 pcscf
    _sip._udp.pcscf 1D SRV 0 0 4060 pcscf
    _sip._tcp_.pcscf 1D SRV 0 0 4060 pcscf

    icscf 1D IN A 192.168.1.100
    _sip 1D SRV 0 0 5060 icscf
    _sip._udp 1D SRV 0 0 5060 icscf
    _sip._tcp 1D SRV 0 0 5060 icscf

    group1-imslab11.in. 1D IN A 192.168.1.100
    necs04.group1-imslab11.in. 1D IN A 192.168.1.100
    group1-imslab11.in. 1D IN NAPTR 10 50 "s" "SIP-D2U" "" _sip._udp.group1-imslab11.in.
    group1-imslab11.in. 1D IN NAPTR 10 50 "s" "SIP-D2T" "" _sip._tcp.group1-imslab11.in.



    scscf 1D IN A 192.168.1.100
    _sip.scscf 1D SRV 0 0 6060 scscf
    _sip._udp.scscf 1D SRV 0 0 6060 scscf
    _sip._tcp.scscf 1D SRV 0 0 6060 scscf


    hss 1D IN A 192.168.1.100
    presence 1D IN CNAME hss

  7. Now you setup reverse zone file (open-ims-rev.dnszone).
    The file open-ims-rev.dnszone looks as below.
    $TTL 86400
    @ IN SOA necs04.group1-imslab11.in. root.group1-imslab11.in. (
    2006101001 ; serial
    3H ; refresh
    15M ; retry
    1W ; expiry
    1D ) ; minimum
    IN NS necs04.group1-imslab11.in


    ; imslan Servers
    100 PTR pcscf.group1-imslab11.in.
    100 PTR icscf.group1-imslab11.in.
    100 PTR scscf.group1-imslab11.in.
    100 PTR hss.group1-imslab11.in.
  8. Now you have configured DNS server. Restart the service /etc/init.d/bind9 restart
  9. From a different machine, point DNS server to new DNS server that you just setup now.
  10. Now ping to any below host, you should be able to ping those.
    group1-imslab11.in
    pcscf.group1-imslab11.in
    scscf.group1-imslab11.in
    icscf.group1-imslab11.in