[lxc-users] Unable to connect to internet from LXC container

Wed Jan 22 15:19:31 UTC 2014

Hi,

Thanks all for your replies. Finally I solved the problem with the help of some networking experts in my team.
Promiscuous mode for the cluster which had VMs was set to "Reject", setting it to "Accept" solved the problem.

Thanks,
Ibha

From: lxc-users-bounces at lists.linuxcontainers.org [mailto:lxc-users-bounces at lists.linuxcontainers.org] On Behalf Of Andreas Laut
Sent: Wednesday, January 22, 2014 1:03 PM
To: LXC users mailing-list
Subject: Re: [lxc-users] Unable to connect to internet from LXC container

We had here same problems like you, but with public IP Addresses only.
Please post your lxc config. Our Workaround was to set a fixed net.hw address but maybe your problem is different.

Bet regards

Am 22.01.2014 04:29, schrieb Gandhi, Ibha (HP Software):
Hi,

Thanks for your reply. I am using proxy server to connect to internet.
>From the host I am able to ping this proxy server but not from the container.
Any pointers?

Thanks,
- Ibha

From: lxc-users-bounces at lists.linuxcontainers.org<mailto:lxc-users-bounces at lists.linuxcontainers.org> [mailto:lxc-users-bounces at lists.linuxcontainers.org] On Behalf Of István Király
Sent: Wednesday, January 22, 2014 8:32 AM
To: LXC users mailing-list
Subject: Re: [lxc-users] Unable to connect to internet from LXC container

Hello Ibha, ...

To me it seems, that you have a private address for your container, 10.x.x.x, and you connect the network over a bridge interface.

if you are using bridging, you need a separate public-IP for your container(s).
If you want to connect to the internet over a single public IP (the IP of your eth0 I assume) you will need to set up IP-mascarading or NAT, or a reverse proxy, to translate communication between your virtual LAN, and the internet.
Depending on your needs, you might have also the option to use IPv6, the above is for classic IPv4.

Greetings, ..

On Tue, Jan 21, 2014 at 7:26 PM, Gandhi, Ibha (HP Software) <ibhag at hp.com<mailto:ibhag at hp.com>> wrote:
Hi,

I am new to LXC and networking in Ubuntu and need help urgently.
I am able to ping the container from the host and vice versa.
The host can connect to internet but the container cannot.
I pinged gateway from container but that also doesn't work.

However, output of route -n from the container is:
ubuntu at root-local-machine-2:~$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0               10.x.x.x            0.0.0.0              UG    100    0        0 eth0
10.x.x.x            0.0.0.0               255.255.x.x     U          0      0        0 eth0

>From the host:
eth0      Link encap:Ethernet  HWaddr 00:50:56:9c:24:d5
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:268433 errors:0 dropped:1103 overruns:0 frame:0
          TX packets:37678 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:29370538 (29.3 MB)  TX bytes:2921285 (2.9 MB)

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:65536  Metric:1
          RX packets:1957142 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1957142 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:523335220 (523.3 MB)  TX bytes:523335220 (523.3 MB)

lxcbr0    Link encap:Ethernet  HWaddr 00:50:56:9c:24:d5
          inet addr:10.x.x.x  Bcast:10.x.x.x  Mask:255.x.x.x
          inet6 addr: fe80::250:56ff:fe9c:24d5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1458768 errors:0 dropped:179 overruns:0 frame:0
          TX packets:767080 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:226231989 (226.2 MB)  TX bytes:127523082 (127.5 MB)

vethSkshFq Link encap:Ethernet  HWaddr fe:d5:d2:af:33:89
          inet6 addr: fe80::fcd5:d2ff:feaf:3389/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:616967 errors:0 dropped:0 overruns:0 frame:0
          TX packets:597510 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:112249698 (112.2 MB)  TX bytes:82433706 (82.4 MB)

Any help will be appreciated.

Thanks,
Ibha

_______________________________________________
lxc-users mailing list
lxc-users at lists.linuxcontainers.org<mailto:lxc-users at lists.linuxcontainers.org>
http://lists.linuxcontainers.org/listinfo/lxc-users

--
István Király
+36 209 753 758
LaKing at D250.hu<mailto:LaKing at D250.hu>

_______________________________________________

lxc-users mailing list

lxc-users at lists.linuxcontainers.org<mailto:lxc-users at lists.linuxcontainers.org>

http://lists.linuxcontainers.org/listinfo/lxc-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxcontainers.org/pipermail/lxc-users/attachments/20140122/40e00a47/attachment.html>