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**cmoman** · Mar 22, 2010, 04:41 AM

Re: Karmic 64 bit, lost correct network configuration

It appears you don't have a gateway or /etc/resolv.conf doesn't have an address of a valid DNS server.

Do you have a DHCP server on your network?
Could this server be allocating 192.168.0.1 to another machine?

What ever is in the /etc/network/interfaces file takes precedence over the desktop graphical network tools.

What is the result of typing?
route -n

If none of the flags show UG, then there is some conflict about how the gateway is being established and the settings in your file are being ignored.

If you do have a gateway, then is the file /etc/resolv.conf filled with valid DNS nameserver addresses? If not, that is your problem.

If you do have a DCHP server, and especially one that you can control I would recommend you comment out everything pertaining to the eth0 interface.

#auto eth0
#iface eth0 inet static
#address 192.168.0.119
#netmask 255.255.255.0
#network 192.168.0.0
#broadcast 192.168.0.255

reboot or restart the networking interface

sudo /etc/init.d/networking restart

you should then find that typing
sudo dhclient

will get you a valid connection to the internet and /etc/resolv.conf will have valid nameservers. Assuming your DHCP server has been configured either automatically or correctly.

If it is important that your machine always has the same ip address, then in your router or where ever you have your DHCP server, include the MAC address and the desired ip address in the DNS server table.

The MAC address can be established by typing the command
ifconfig -a

and looking for the alpha numeric after HWaddr listed under eth0

Hope that helps.

**oshunluvr** · Mar 22, 2010, 10:55 AM

Re: Karmic 64 bit, lost correct network configuration

My guess is gateway route is missing. Common issue using knetworkmanager.

Type "route -n" in a terminal and you should see something like:

Code:

Kernel IP routing table
Destination   Gateway     Genmask     Flags Metric Ref  Use Iface
192.168.1.0   0.0.0.0     255.255.255.0  U   0   0    0 eth0
169.254.0.0   0.0.0.0     255.255.0.0   U   1000  0    0 eth0
0.0.0.0     192.168.1.1   0.0.0.0     UG  100  0    0 eth0

You can manually force the route but I never could get it to stay after a reboot.

My solution was to remove knetworkmanager and build /etc/resolv.conf by hand.

**tomblanford** · Mar 22, 2010, 06:55 PM

Re: Karmic 64 bit, lost correct network configuration

Much joy. Problem fixed. A few additional details might help others with this problem. The ifconfig data went off into the weeds during one of the strange boots Koala does on my machine. The grub loader plainly states "beta version". Reading other posts on this site clearly indicate there are problems with the load sequence for Koala. I have experienced like problems but have always found a work around. This time the boot sequence some how mutilated my resolv.conf file. It left behind strange IP addresses parts of which showed up in the ifconfig data.

The resolv.conf file contains the URLs of the "nameservers" that turn domain names into numeric addresses. No name servers listed, no IP addresses to route to.

I absolutely love Karmic and the applications it provides but I sure wish they would hurry with the updates/bug fixes for this version. I fully expect the problem to reoccur. This time, however, I'll know how to quickly fix the problem.

Special thanks to the two gentlemen that gave me a clue where to look.

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Karmic 64 bit, lost correct network configuration

Karmic 64 bit, lost correct network configuration

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