I
am attempting to setup a firewall in a DomU. The firewall program I
eventually want to run is Shorewall.
Both
my Dom0 and DomU are Debian Lenny 64 bit systems. The Dom0 has four
physical network interfaces installed. Currently, one of the NICs is
hidden using the pciback.hide command in the /boot/grub/menu.lst file.
Similarly, the hidden NIC is passed to the DomU using the pci =
['device:address.0'] line in the DomU configuration file.
When
I modify the DomU configuration file only to include the pci directive
without an additional vif line, the networking works as expected in the
DomU. All of the networking settings are done in the
/etc/network/interfaces file within the DomU.
I
want to run a three interface firewall using Shorewall. The physical
NIC (eth0) will be used on the external side. I want to add two
virtual interfaces to the DomU for use as a DMZ interface (eth2) and
private LAN interface (eth1).
Therefore,
I returned to the DomU configuration file and added a vif line
containing only the MAC address and Dom0 bridge. No IP address is
listed within the vif line in the DomU configuration file.
When
starting the DomU, networking no longer works as expected. Examining
the results of ifconfig, I see that the DomU has assigned the NICs
differently than I would expect. Examining the MAC addresses, the
passthrough NIC is now assigned as eth1 rather than eth0.
In
a typical installation, I would edit
/etc/udev/rules.d/70-persistent-net.rules to manually assign the netdev
names based on MAC address. However, this file doesn't exit in my
newly created Debian Lenny DomU.
Can
I simply create the file? Does this file not exist due to some
underlying Xen issue? How should I rectify this problem?
Additional
sanitized Info:
server#
xm info
host : server.example.com
release : 2.6.26-1-xen-amd64
version : #1 SMP Fri Mar 13 21:39:38 UTC 2009
machine : x86_64
nr_cpus : 4
nr_nodes : 1
cores_per_socket : 1
threads_per_core : 2
cpu_mhz : 2992
hw_caps : bfebfbff:20100800:00000000:00000180:0000641d
total_memory : 4030
free_memory : 0
node_to_cpu : node0:0-3
xen_major : 3
xen_minor : 2
xen_extra : -1
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
cc_compiler : gcc version 4.3.1 (Debian 4.3.1-2)
cc_compile_by : waldi
cc_compile_domain : debian.org
cc_compile_date : Sat Jun 28 09:32:18 UTC 2008
xend_config_format : 4
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