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DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade

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dansto.well+myth at gmail

Jun 11, 2012, 2:39 PM

Post #1 of 5 (363 views)
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DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade

Hi all,

If you've any advice at all about getting DNS working after my
mythbuntu upgrade, I'd be very grateful...
https://answers.launchpad.net/ubuntu/+question/199809

Anyone experienced similar?

Thanks
Dan

---------- Forwarded message ----------
From: danstowell <question199809 [at] answers>
Date: 2012/6/8
Subject: [Question #199809]: DNS not working after Precise 11.10 ->
12.04 Mythbuntu upgrade
To: danstowell+launch [at] gmail

New question #199809 on Ubuntu:
https://answers.launchpad.net/ubuntu/+question/199809

Hi - upgraded Mythbuntu 11.10 to 12.04, and I can't get DNS resolution
to work, so I can't access any web. I upgraded using the normal GUI
program.

My local network works ("ping 192.168.254.13" successfully pings my
other machine); I can ssh to the machine from outside; I can ping IP
addresses outside the network.

I don't have any weird network setup as far as I know, and I don't
want anything weird - just a single wired connection.

Here are some file contents and diagnostics:

I don't have a file /run/nm-dns-dnsmasq.conf

Here's /etc/network/interfaces :
=======================================================
auto lo
iface lo inet loopback

#auto eth0
#iface eth0 inet static
# address 192.168.254.202
# netmask 255.255.255.0
# network 192.168.254.0
# broadcast 192.168.254.255
# gateway 192.168.254.254

auto eth1
iface eth1 inet static
address 192.168.254.1
netmask 255.255.255.0
network 192.168.254.0
broadcast 192.168.254.255
gateway 192.168.254.254

=======================================================

$ ifconfig
eth1 Link encap:Ethernet HWaddr aa:00:04:00:0a:04
inet addr:192.168.254.1 Bcast:192.168.254.255 Mask:255.255.255.0
inet6 addr: fe80::a800:4ff:fe00:a04/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:579 errors:0 dropped:0 overruns:0 frame:0
TX packets:519 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:114187 (114.1 KB) TX bytes:66795 (66.7 KB)
Interrupt:17

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:313 errors:0 dropped:0 overruns:0 frame:0
TX packets:313 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:29500 (29.5 KB) TX bytes:29500 (29.5 KB)

virbr0 Link encap:Ethernet HWaddr de:c5:2b:8d:a7:e2
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

$ nm-tool

NetworkManager Tool

State: disconnected

- Device: eth1 -----------------------------------------------------------------
Type: Wired
Driver: sky2
State: disconnected
Default: no
HW Address: AA:00:04:00:0A:04

Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s

Wired Properties
Carrier: on

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dbrieck at gmail

Jun 11, 2012, 3:55 PM

Post #2 of 5 (342 views)
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Re: DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade [In reply to]

On Mon, Jun 11, 2012 at 5:39 PM, Dan <dansto.well+myth [at] gmail> wrote:

> Hi all,
>
> If you've any advice at all about getting DNS working after my
> mythbuntu upgrade, I'd be very grateful...
> https://answers.launchpad.net/ubuntu/+question/199809
>
> Anyone experienced similar?
>
> Thanks
> Dan
>
>
> Try putting your name servers in /etc/resolv.conf

I always use these: https://developers.google.com/speed/public-dns/

newbury at mandamus

Jun 11, 2012, 7:49 PM

Post #3 of 5 (332 views)
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Re: DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade [In reply to]

On 06/11/2012 06:55 PM, David Brieck Jr. wrote:
> On Mon, Jun 11, 2012 at 5:39 PM, Dan<dansto.well+myth [at] gmail> wrote:
>
>> Hi all,
>>
>> If you've any advice at all about getting DNS working after my
>> mythbuntu upgrade, I'd be very grateful...
>> https://answers.launchpad.net/ubuntu/+question/199809
>>
>> Anyone experienced similar?
>>
>> Thanks
>> Dan
>>
>>
>> Try putting your name servers in /etc/resolv.conf

The device description in /etc/sysconfig/networking/devices/ifcfg-eth0
in *FEDORA*, looks like this:
DEVICE=eth0
HWADDR=00:11:22:33:44
BOOTPROTO=none
ONBOOT=yes
NM_CONTROLLED=yes
TYPE=Ethernet
IPV6INIT=no
USERCTL=yes
IPADDR=192.168.11.95
NETMASK=255.255.255.0
GATEWAY=192.168.11.1
PREFIX=24
DNS1=67.55.0.11
DNS2=64.71.255.198

Nameservers are also defined in /etc/resolv.conf.

Moreover, the nameserver's IP addresses are *also* defined in the
router. Might be best to start there, and work down into your net, from
there.
G.

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dansto.well+myth at gmail

Jun 12, 2012, 12:45 AM

Post #4 of 5 (327 views)
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Re: DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade [In reply to]

2012/6/12 R. G. Newbury <newbury [at] mandamus>:
> On 06/11/2012 06:55 PM, David Brieck Jr. wrote:
>>
>> On Mon, Jun 11, 2012 at 5:39 PM, Dan<dansto.well+myth [at] gmail> wrote:
>>
>>> Hi all,
>>>
>>> If you've any advice at all about getting DNS working after my
>>> mythbuntu upgrade, I'd be very grateful...
>>> https://answers.launchpad.net/ubuntu/+question/199809
>>>
>>> Anyone experienced similar?
>>>
>>> Thanks
>>> Dan
>>>
>>>
>>> Try putting your name servers in /etc/resolv.conf

Thanks all - it turns out the fix was to put "dns-nameservers 8.8.8.8
8.8.4.4" in /etc/network/interfaces - I'm using network manager which
means there's no point editing /etc/resolv.conf manually, it gets
overwritten.

Best
Dan
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brent.bolin at gmail

Jun 12, 2012, 6:32 AM

Post #5 of 5 (321 views)
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Re: DNS not working after Precise 11.10 -> 12.04 Mythbuntu upgrade [In reply to]

On Tue, Jun 12, 2012 at 2:45 AM, Dan <dansto.well+myth [at] gmail> wrote:
> 2012/6/12 R. G. Newbury <newbury [at] mandamus>:
>> On 06/11/2012 06:55 PM, David Brieck Jr. wrote:
>>>
>>> On Mon, Jun 11, 2012 at 5:39 PM, Dan<dansto.well+myth [at] gmail> wrote:
>>>
>>>> Hi all,
>>>>
>>>> If you've any advice at all about getting DNS working after my
>>>> mythbuntu upgrade, I'd be very grateful...
>>>> https://answers.launchpad.net/ubuntu/+question/199809
>>>>
>>>> Anyone experienced similar?
>>>>
>>>> Thanks
>>>> Dan
>>>>
>>>>
>>>> Try putting your name servers in /etc/resolv.conf
>
> Thanks all - it turns out the fix was to put "dns-nameservers 8.8.8.8
> 8.8.4.4" in /etc/network/interfaces - I'm using network manager which
> means there's no point editing /etc/resolv.conf manually, it gets
> overwritten.
>
> Best
> Dan
> _______________________________________________
> mythtv-users mailing list
> mythtv-users [at] mythtv
> http://www.mythtv.org/mailman/listinfo/mythtv-users

It was driving me crazy also.

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN

man resolvconf
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