Configuring the TAP version of the HTTP server

Peter Nguyen peter.nguyen at ...29...
Tue Feb 23 13:17:10 CET 2010


So i copied the three scripts Sven provided, and I am not able to get  
the bridged connection working. Every time i run the script, the  
current eth0 connection is closed, and another ethernet connection is  
created that results in no interaction with the outside world. When i  
close the server and run the script, the ethernet connection  
goes back to normal.

Am i meant to follow the instructions you provided in your email  
before i run these scripts? I tried doing that myself and it didn't  

Peter Nguyen
Jacaranda Research Group

On 23/02/2010, at 7:47 PM, Christian Helmuth wrote:

> Hi Peter,
> On Tue, Feb 23, 2010 at 01:40:42PM +1030, Peter Nguyen wrote:
>> OK, so now i've got the server up and running, and I can use the  
>> local
>> web browser to access the address
> Great :-D
>> However, I was under the impression that this IP address could be
>> accessed by other machines. Am I right in saying this? Or is access
>> to this server only restricted to other qemu instances?
> I'm not sure if I understand your question, but... Qemu is using the
> Linux tun/tap network device to provide a virtual ethernet NIC to the
> guest OS. The tap device is subject to Linux' standard networking
> configuration, i.e., is just a new NIC at the host. If you don't
> configure your system for bridging (as Sven outlined) or with special
> IP forwarding rules, no other machine has access to your emulated
> system in Qemu.
> Cheers
> -- 
> Christian Helmuth
> Genode Labs
> ·
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