10.10 Can't Access Internet

[c24ck32]

Hello,

This is just plain weird, it use to have access to internet and now it doesn't.

It can ping the local network and I could ssh into it, even through internet using it's public IP.

Here's the /etc/network/interface:

iface lo inet loopback

auto eth4
iface eth4 inet manual

auto br0
iface br0 inet static
   address 192.168.40.14
   netmask 255.255.255.0
   network 192.168.40.0
   broadcast 192.168.40.255
   gateway 192.168.40.1
   bridge_ports eth4
   bridge_stp off
   bridge_fd 0
   bridge_maxwait 0
   dns-nameservers 192.168.40.11

auto eth2
iface eth2 inet static
   address 192.168.20.12
   netmask 255.255.255.0

If I try to ping let's say google.com, it could resolve the IP address but that's about it.

Before it gave me the postfix error when I restarted networking service, but I just remove postfix since I don't need to send emails from it.

Could anyone enlightened me.

Thank you

[sanderj]

Ubuntu 10.10? That's not supported anymore since April last year.

And: why don't you use DHCP?

[c24ck32]

Hi sanderj,

Thank you for looking at my thread.

I know that 10.10 is not supported anymore but what I'm asking is why it is not working for something that has been working before..

And I used DHCP for users computer, this one is suppose to be the NAS-SERver and I have to use different IP for the different sub-network as you can see in my /etc/network/interfaces

I would like to upgrade to 12.04, I just don't have the time right now, and looking for an answer to my question..

Thank you

[sanderj]

What did you research yourself?

can you ping local IP addresses?

What's the output of

mtr -nrc2 8.8.8.8

[c24ck32]

Hello again sanderj

I can ping any local IP addresses

mtr -nrc2 8.8.8.8

HOST: nas-server                  Loss%   Snt   Last   Avg  Best  Wrst StDev
  1. 192.168.40.1                  0.0%     2    2.1  82.9   2.1 163.7 114.3
  2. 192.168.40.2                  0.0%     2    4.6   3.5   2.5   4.6   1.5
  3. ???                          100.0     2    0.0   0.0   0.0   0.0   0.0

It seems that I can't get pass the router, which any other machine can, and I have another server that has the same configuration and it works fine.

Any other suggestion?

I'm not an expert on networking, but I always wanted to learn more.

[sanderj]

And on the functional machines: what's the output of "mtr -nrc2 8.8.8.8"?

Why is 192.168.40.1 sending to 192.168.40.2?

[c24ck32]

This is mtr -nrc2 8.8.8.8 from the functional machine

user@OM:~$ mtr -nrc2 8.8.8.8
HOST: OM                          Loss%   Snt   Last   Avg  Best  Wrst StDev
  1.|-- 192.168.40.1               0.0%     2    4.1  82.9   4.1 161.7 111.4
  2.|-- 192.168.40.2               0.0%     2    0.1   0.2   0.1   0.2   0.0
  3.|-- 203.77.224.65              0.0%     2    0.6   0.7   0.6   0.8   0.1
  4.|-- 203.77.236.129             0.0%     2    1.7   1.8   1.7   2.0   0.2
  5.|-- 203.77.227.33              0.0%     2    2.2   2.2   2.2   2.2   0.0
  6.|-- 203.77.227.14              0.0%     2    4.6   4.5   4.4   4.6   0.1
  7.|-- 119.110.117.1              0.0%     2    6.1  14.7   6.1  23.2  12.1
  8.|-- 119.110.116.134            0.0%     2   24.3  26.0  24.3  27.8   2.5
  9.|-- 66.249.95.122              0.0%     2   26.8  24.6  22.5  26.8   3.0
 10.|-- 209.85.242.243             0.0%     2   24.3  32.4  24.3  40.6  11.5
 11.|-- 209.85.250.255             0.0%     2   29.8  40.2  29.8  50.6  14.7
 12.|-- ???                       100.0     2    0.0   0.0   0.0   0.0   0.0
 13.|-- 8.8.8.8                    0.0%     2   31.5  32.0  31.5  32.6   0.8

I used 192.168.40.1 as the gateway and 192.168.40.2 is the router

To make internet connection on ubuntu what files that I have to check?

I could think of:
- /etc/network/interfaces
- /etc/hosts
- /etc/resolv.conf

Is there any config files that I have to check?

Thanks,

[sanderj]

Back to the basics:

Switch the NAS device to DHCP-client, reboot, see if Internet works.

Based on the result, you can proceed your analysis.

[Iowan]

dns-nameservers 192.168.40.11

This machine is online?
I'm not familiar w/ mtr, but don't see .11 in the lists.

[c24ck32]

Back to the basics:

Switch the NAS device to DHCP-client, reboot, see if Internet works.

Based on the result, you can proceed your analysis.

I can't do that right now, the NAS is being used by the users.

Oh I forgot to mention at the beginning, I use bridge settings because I use the server to run KVMs, surprisingly the Ubuntu on the KVM could connect to internet.

If I switch the NAS-server to use DHCP then I would lost the ability to bridge the connection to the KVM, wouldn't I?