[poky] QEMU networking

[Mark Hatle]

I had the same problem on my Fedora host.  It turned out that the iptables rules
were prohibiting the forwarding of packets from one network to another, causing
the route to the internet to black hole.

Check that you don't have any IP tables that are preventing the routing from
working.

--Mark

On 5/12/11 11:10 AM, Gary Thomas wrote:
> I'm having a devil of a time getting networking to work when
> I run qemu (a Poky derived image, of course!)  I'm running this
> on a box which itself is NAT'd to the real internet, like this:
> 
>     +-------------+        +------------------+
>     |   QEMUarm   |<------>|   My_Desktop     |<----> Internet
>     | 192.168.7.2 |        |   192.168.7.1    |
>     +-------------+        |   192.168.1.125  |
>                            +------------------+
> 
> Firstly, something is messing with the routing tables over time
> and I can't get past the first hop.  If I reconfigure the network
> on the QEMU system like this:
>    # ifconfig eth0 down
>    # ifconfig eth0 up
>    # route add default gw 192.168.7.1
> I can then access past "My_Desktop", e.g.
>    # ping 192.168.1.101
>       -or-
>    # ping 74.125.225.19    (www.google.com)
> This works fine and the routing table (route.good) is correct.
> 
> A little while later (minutes), the routing changes and now I can't
> get past 'My_Desktop' (i.e. I can ping 192.168.1.125, but not 192.168.1.101)
> The routing table has changed (route.bad)
> 
> What causes this?  I don't have avahi running anywhere and I've explicitly
> disabled that daemon on the QEMU system.
> 
> Finally, there seems to be no name resolution - /etc/resolv.conf comes
> up as:
>    nameserver 127.0.0.1
> If I want to resolve any real names, I have to update it manually.
> 
> Note: I'm running core-image-sato with web-webkit added using zypper.
> 
> Are others actually using the network with QEMU images?  like this?
> 
> 
> 
> 
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