How to configure static IP address on Lan card
eth0 on Ubuntu and Debian Linux
Linux Does your provider provides you with a connection to the
internet via a static IP address? Are you an Ubuntu or Debian user
like me? Are you looking for a way to configure your eth0 Linux
network card with the static ISP provided IP address? That was the
scenario with me and in this article I will explain, how you can
configure your Home internet access with your Ubuntu/Debian based
Linux.
Both Ubuntu and Debian does have a graphic tools, which also can be
used to set a static IP address to your network interface, however
I find it easier to do it straight from the command line.
To configure your internet static IP via a command line, what you
will need to modify is the file:
/etc/network/interfaces
In order to configure a static IP address, your provider should
have equipped you with few IP addresses like let's say the example
values below:
Host IP Address: 192.168.0.5
Netmask Address: 255.255.255.0
Gateway: 192.168.0.1
Primary DNS Server: 192.168.0.1
Secondary DNS Server: 192.168.0.2
Now edit with vim, nano or mcedit
/etc/network/interfaces
e.g.:
root@ubuntu:~# mcedit
/etc/network/interfaces
A plain
/etc/network/interfaces file should contain
something similar to:
auto lo
iface lo inet loopback
In order to be able to set your static IP address, Netmask, Gateway
and DNS servers you will have to append in the
interfaces
file, the settings:
iface eth0 inet static
address 192.168.0.1
netmask 255.255.255.0
network 192.168.0.0
gateway 192.168.0.1
The
eth0 sets the lan card on which the values will be
assigned,
address variable is the IP address assigned by
your ISP,
netmask is logically the netmask,
network
should always be configured same as the value set for
address but the last ip block should be always
.0 ,
gateway as you already know is the gateway (the ISP router).
One more thing you need to do is to configure your DNS servers by
including the DNS ip addresses to
/etc/resolv.conf , just
issue something like:
root@ubuntu:~# echo 'nameserver 192.168.0.1' >>
/etc/resolv.conf
root@ubuntu:~# echo 'nameserver 192.168.0.2' >>
/etc/resolv.conf
To test that your new Linux static ip configuration is correct
exec:
root@ubuntu:~# /etc/init.d/networking
restart
Next use ping or (if ping is disabled by ISP), use matt's
traceroute
(mtr) or a browser to test if the Linux is
connected to the net.
ubuntu:~# ping google.com
...
ubuntu:~# mtr google.com
If none of the two are not able to show either ping requests
flowing around, or routes to google, then something is either wrong
with your internet configuration or you forgot to pay your internet
bill ;)