Are you setup to forward IP packets on the host? Something like:
~$ cat /proc/sys/net/ipv4/conf/all/forwarding
1
~$
This assumes that you're using your host as a gateway. Alternatively, is
br0 connected to a physical device? For example:
~# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.00e0815a0eba no apache-test
mail
~#
In this case, I don't need (or want) the 'forwarding' flag. The bridging
interface will automatically forward packets out eth0.
Tony
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of [EMAIL PROTECTED]
> Sent: Monday, December 12, 2005 1:25 PM
> To: user-mode-linux-user@lists.sourceforge.net
> Subject: [uml-user] UML Bridging and subnets
>
> Hello,
>
> I'm usually pretty good at finding answers on my own, but
> I've only been
> able to find information in regard to private UML networks
> and NAT etc.
>
> I have some UMLs that are unable to access the network beyond
> the host.
> Here is the scenario:
>
> (Sorry about the "999", I'm using routable IPs)
>
> Host IP (br0): 999.999.165.229
> UML IP (tap1): 999.999.165.231
> UML IP (tap2): 999.999.160.52
>
> Now the first UML instance, tap1 165.231, can get to the
> network beyond
> the host, but the second cannot.
>
> While searching the net for my answer, I did find some info
> that seemed
> to imply I must alias a similar IP to the bridge so I did, Host br0:1
> 999.999.160.49. Now the host and the second UML can reach each other,
> but it still can't get beyond the host.
>
> Must the host be setup as a gateway? Do I need to use iptables etc?
>
> Thank-you,
>
> ---Dan
>
>
>
>
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