Categories
ubuntu

Setting up bind DNS server for local domain and forwarder

This post will cover the setup of a bind server within the local network. It will resolve my.homezone locally on the bind server and forward all other requests to the google dns servers.

network = 192.168.1.0/24
bind server ip = 192.168.1.4
webserver ip = 192.168.1.5
local domain : my.homezone

Bind Installation

$ sudo apt-get update [ENTER]
$ sudo apt-get install bind9 bind9utils bind9-doc [ENTER]

named.conf.options

$ sudo vi /etc/bind/named.conf.options [ENTER]

Now we will define the clients allowed to query the bind server, to do so add the following (1st line).

acl trusted{
localhost;
192.168.1.0/24;
}

Now we have to define the forwarders within the options configuration.

forwarders{
192.168.1.4;
8.8.8.8;
8.8.4.4;
}
recursion yes;
allow-query {trusted;};
allow-recursion {trusted;};
listen-on {192.168.1.4;};
allow-transfer {none;};

save the file
now we check the config

$ named-checkconf [ENTER]

In case there’s no errors we can proceed.

Our zonefile¬† “my.homezone”

$ sudo vi /etc/bind/named.conf.local [ENTER]

add the zone as followed

zone "my.homezone" {

type "master";
file "/etc/bind/zones/my.homezone";

}

Now we have to create the zonefile :

$ cd /etc/bind/zones [ENTER]
$ sudo cp ../db.local ./my.homezone [ENTER]
$ sudo vi my.homezone [ENTER]

Your file shall look similiar to this one :

@   IN      SOA     ns1.my.homezone. hostmaster.my.homezone. (
                              5         ; Serial
                         604800         ; Refresh
                          86400         ; Retry
                        2419200         ; Expire
                         604800 )       ; Negative Cache TTL
;

; Name servers
my.homezone.    IN      NS      ns1.my.homezone.
ns1.my.homezone.             IN      A       192.168.1.4

; Other A records
; Web Server
www.my.homezone.             IN      A      192.168.1.5

Does the webserver resolve

$ host www.my.homezone [ENTER]

should return

www.my.homezone has adress 192.168.1.5

resolv.conf

Finally we have to make sure it also works on reboot. Ubuntu tends to overwrite /etc/resolv.conf. We need to install resolvconf to prevent the system from overwriting the configuration on boot.

$ sudo apt-get install resolvconf
$ sudo vi /etc/resolvconf/resolv.conf.d/head

add the following entries to the file

nameserver 192.168.1.4
search my.homezone

Check our settings

$ named-checkconf [ENTER]
$ named-checkzone my.homezone /etc/bind/zones/my.homezone

Now reboot and check if server resolves internal zone after boot.

In case there’s no errors you have successfully setup a bind server with your own domain. Congratulations.

Categories
ubuntu

Howto Install SSH on Ubuntu

First of all make sure your ubuntu is up to date by executing the following commands.

sudo apt-get update;apt-get upgrade [ENTER]

then install the ssh server