Hi,

I need some pointers on how to "passthrough" ppp0 traffic to eth0. I do have 4 boxes at home, 2 of them run Windows 7, one laptop running Windows XP and "my baby" an Intel Atom D510M platform running Gentoo.

To make matter more complex I do use the Gentoo box as a Virtualization playground. I called her vixen Now the thing I would like to achieve is sort of "bridge" my ppp0 connection (It's a crappy Huawei E173 USB modem) to a VM running sort of firewall appliance (gentoo-xen-amd64, called it hellgate64). From my ISP I get just one public IP and I want to assign it to eth0 on hellgate64 (eth0 on hellgate is vif1.0 on vixen, bridged).

When I was using different ISP it wasn't an issue, I recieved a router (NanoStation5 + a single public IP) and connected it to the eth0 of vixen, bridged it to vif1.0 (eth0 on hellgate64) and I was happy (everyone was happy, actually).

Now I'm forced to use this USB _thing_. I found myself struggling with it for a week now. I got ppp0 up and running on vixen (google is a good friend indeed) everything was almost OK. Last thing to do was "bridging" the connection which I found myself incompetent to do.

So, Community, please help, I feel quite comfortable with linux, esp. Gentoo, I know my way around and I'm more than happy to learn new things. Should any more info be needed ask

Thank You all in advance.

P.S. Should this thread be posted in Virtualization board, just tell me

You can't, unless it is PPP over ethernet.

At a guess you could route it:
Delete the IP address from ppp0, and add it to the virtual machine. Then add an appropriate static route for that IP address. If you want to send all outgoing traffic via the virtual machine you will need use source routing.

Alternatively connect the modem to the virtual machine at serial or USB levels, VirtualBox can do this, I don't know about Xen.

Hi,

thanks TimothyEBaldwin. Unfortunately, I'm bound to PPP. On the other hand,XEN has the ability to pass USB device/s to the guest operating system. Yet I've experineced serious problems (hard server hang, including hypervisor's crash) after passing the modem device to the VM (which would make a great topic for the Vitualization forum), thus I'm looking for some other solution.

Your answer made my fears come true, namely I have to use routing and thus </thread>