Allowing DHCP service to virtual machines

I use Guarddog as a firewall on my Kubuntu Gutsy laptop.

Now I've installed VirtualBox and I find that my virtual machines
can't get DHCP service unless I disable the firewall.

I s'pect this is a trivial tweak but, alas, DHCP isn't one of the
protocols that I can turn on and off between zones. On the "Advanced"
tab there's a DHCP box with two options:

Enable DHCP on interfaces:
Enable DHCP server on interfaces:

Each option has a check box as well as a text box where I can enter a
comma-separated list of interfaces. The first one contains eth0 (by
default, I think, but I've had GuardDog a while).

I've attached some more details about my situation. They're
VirtualBox-specific but it seems the problem lies with GuardDog.

So now I have three possible interface names to give to Guarddog, and
I tried enabling them all in both options:

x Enable DHCP on interfaces: vbox0,br0,eth0
x Enable DHCP server on interfaces: vbox0,br0,eth0

My virtual machine (also Kubuntu Gutsy) still can't get an IP address
from DHCP. When I disable the firewall, it gets the address in a
couple of seconds.

I tried adding a user-defined protocol, UDP, ports 67 & 68,
bidirectional. Still no joy.

Grateful for the words to set me straight,
Ted



--
    
Email and shopping with the feelgood factor!
55% of income to good causes. http://www.ippimail.com

-------------------------------------------------------------------------
SF.Net email is sponsored by:
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open Source.
http://sourceforge.net/services/buy/index.php

_______________________________________________
Guarddog-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/guarddog-user

To allow bridged networking for my virtual machines, I've set up a
bridge as follows:

 1. Set up bridging once:

    sudo apt-get install bridge-utils uml-utilities
    sudo chgrp vboxusers /dev/net/tun
    sudo chmod g+rw /dev/net/tun
    sudo /etc/init.d/networking stop

 2. Edit /etc/network/interfaces:
    =========================
    auto lo
    iface lo inet loopback

    # Note this one is manual (not dhcp) so br0 gets the IP address
    auto eth0
    iface eth0 inet manual

    # bridge
    auto br0
    iface br0 inet dhcp
    	bridge_ports eth0
    =========================

 3. Restart networking (from the console!). It's possible you'll need
    to power-cycle the machine, but try this first:

    sudo /etc/init.d/networking start

 4. Create at least one permanent, bridged TAP interface, assigned to
    the desired user. I like to name them vbox0, vbox1, and so on:

    sudo VBoxAddIF vbox0 ted br0