Kubuntu

anjanesh · 01-11-2009, 07:56 AM

I just installed Kubuntu on a PC which is connected to a LAN - router.
But Im unable to connect to the internet.
ping 192.168.1.* works but ping google.com returns unknown host. I can ping to all other PCs.

I have this in my /etc/network/interfaces

Code:

#eth0 main
auto eth0
iface eth0 inet dhcp

auto lo
iface loopback inet loopback

I even tried specifying gateway (192.168.1.1) though it was already detected via DHCP before I added it.
Any idea why my internet isnt working ?

Thanks

ajlewis2 · 01-11-2009, 09:36 AM

Does this work?

ping 74.125.45.100

If you get feedback on it, then check your DNS to make sure you have that entered in your network setup.

bmarx · 01-11-2009, 11:38 AM

Do you have a default gateway (~$route)?

framp · 01-11-2009, 12:10 PM

Might be there is no default route set, might be there is no dns server defined, might be the dns server is no dns server, might be ...

We need details about your network config ;-) .

Pls execute this script and check the error messages and fix them by reading the referred URLs. If there are no config errors detected post the output of the log file collectNWData.txt in this forum or phpfi.com. This will give us defails about your network config and we most probably will be able to help you to get your problem fixed.

anjanesh · 01-12-2009, 03:03 AM

Code:

~$cat /etc/resolv.conf
nameserver 192.168.1.1

~$cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

~$route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
link-local      *               255.255.0.0     U     1000   0        0 eth0
default         192.168.1.1     0.0.0.0         UG    100    0        0 eth0

ping 74.125.45.100 works !
I get the google.com page when I enter 4.125.45.100 in konqueror !

linuxlover.chaitanya · 01-12-2009, 03:24 AM

Do you say your problem is solved? If not then its a DNS issue. Your system is not able to resolve the names of the ips.

anjanesh · 01-12-2009, 03:41 AM

Not solved.

Quote:

Your system is not able to resolve the names of the ips.

How do I get that done ? I thought this would be take care of by the router.

Do I need to add the same nameserver IPs mentioned in the router to my PC's /etc/resolv.conf file ?

linuxlover.chaitanya · 01-12-2009, 04:18 AM

You could try that. But your router should do that for you. But if it is not resolving then editing your resolv.conf could be your answer.

anjanesh · 01-12-2009, 04:56 AM

/etc/resolv.conf had just nameserver 192.168.1.1

Code:

/etc/init.d/networking stop

sudo kate /etc/resolv.conf 
// I added the nameservers and deleted 192.168.1.1

cat /etc/resolv.conf
203.94.227.70
203.94.243.70

/etc/init.d/networking start
cat /etc/resolv.conf
192.168.1.1

How come the edits made to /etc/resolv.conf were gone after starting the network ?

anjanesh · 01-12-2009, 05:57 AM

Solved.
I edited /etc/dhcp3/dhclient.conf
and uncommented prepend domain-name-servers and added the DNS servers here.

linuxlover.chaitanya · 01-12-2009, 06:02 AM

If you have a dhcp server running you can configure it to give dns information with ip address as well. You need not manually edit your resolv.conf file then.

anjanesh · 01-12-2009, 11:44 AM

On the Windows PCs which are on the same LAN, the DNS servers mentioned on all Windows PCs are

Code:

203.xx.xxx.70
203.xx.xxx.70

While the DNS servers mentioned in the router is

Code:

203.xx.xxx.1
203.xx.xxx.1

So Im guessing that the DNS in the router is wrong and should've been 203.xx.xxx.70 instead of 203.xx.xxx.1.

linuxlover.chaitanya · 01-12-2009, 11:07 PM

So you could configure your dhcp to relay dns information as well. If your router acts as a dhcp server then edit the dns information in router manually.