Problems setting up DNS, gateway und subnetmask!

[cogyfarm]

Tamer Higazi wrote:

> Hi!
> I have received from my ISP an IP, DNS, Subnetmask and the DNS 
> Serverentries to add to my ubuntu linux machine
>
> My interfaces File /etc/network/interfaces:
> # This file describes the network interfaces available on your system
> # and how to activate them. For more information, see interfaces(5).
>
> # The loopback network interface
> auto lo
> iface lo inet loopback
> address 127.0.0.1
> netmask 255.0.0.0
>
> # This is a list of hotpluggable network interfaces.
> # They will be activated automatically by the hotplug subsystem.
> mapping hotplug
> script grep
> map eth0
>
> # The primary network interface
>
>
> auto eth0
>
> iface eth0 inet static
> address 81.10.53.22
> netmask 255.255.255.252
> gateway 10.0.0.138
> dns-search lan
> dns-nameservers 163.121.128.134 212.103.160.18
>
> My File /etc/hosts:
>
> 127.0.0.1 localhost.localdomain localhost ubuntu
> # The following lines are desirable for IPv6 capable hosts
> fe00::0 ip6-localnet
> ff00::0 ip6-mcastprefix
> ff02::1 ip6-allnodes
> ff02::2 ip6-allrouters
> ff02::3 ip6-allhosts
>
> If I enter the command route:
>
> Kernel IP Routentabelle
> Ziel Router Genmask Flags Metric Ref Use Iface
> 81.10.53.20 * 255.255.255.252 U 0 0 0 eth0
>
> If I run explicitly this command to add the gateway to my eth0 interface:
>
>
> sudo route add default gateway 10.0.0.138 eth0
>
> I receive this errormessage:
> SIOCADDRT: Das Netzwerk ist nicht erreichbar (Network unreachable)
>
>
> For any help solving my problem, thanks in advance
>
> Tamer
>
10.x.x.x. is a class A PRIVATE IP.  It can't be used for external access 
unless its being pointed to a nat solution.  Your systems trying to tell 
you it doesn't know where to find the 10.x class A because its 
undefined. Und Das ist nicht gut!
Troy