Archive for the 'Xen' Category

image_pdfimage_print

DEF CON 24 Presentation: VLAN Hopping, ARP Poisoning, & Man-in-the-Middle Attacks in Virtualized Environments

DefCon 23 Presentation: Exploring Layer 2 Network Security in Virtualized Environments

DefCon 23 Video Demo: MAC Flooding on Citrix XenServer 6.2 with Open vSwitch 1.4.6

DefCon 23 Video Demo: MAC Flooding on Gentoo/Xen with Open vSwitch 2.0.0

DefCon 23 Video Demo: MAC Flooding on Gentoo/Xen with 802.1d Bridging

Exploring Layer 2 Network Security In Virtualized Environments – DerbyCon 4.0

I gave a talk this past weekend on part of my Ph.D. dissertation research at the DerbyCon 4.0 “Family Rootz” Computer Security conference in Louisville, KY. Take a look at the following video to view the talk in its entirety. The rest of the conference videos are available here.

 

 

Installing Open vSwitch on Gentoo (Xen Hypervisor)

The Gentoo ebuild for Open vSwitch does not seem to work with the latest available kernel as of this writing (3.10.7-gentoo-r1). This post is documentation of the process that I performed in order to successfully install Open vSwitch on a Gentoo server running the Xen hypervisor. This guide assumes that you already have a Gentoo environment configured and running with the Xen hypervisor available in portage.

Continue reading ‘Installing Open vSwitch on Gentoo (Xen Hypervisor)’

Xen Cloud Platform (XCP) – Cloning Hard Drive Woes

The main hard drive seems to be flaky in one of my XCP servers. I decided to use Clonezilla to clone sda to another drive to see if it is in fact the hard drive. After cloning over the drive I found that my LVM storage group VG_XenStorage-xxx was not mounting, and XenCenter was giving off the following error when trying to connect to the server: “This server cannot see any storage”

Continue reading ‘Xen Cloud Platform (XCP) – Cloning Hard Drive Woes’

Xen Cloud Platform (XCP) – Assigning A VLAN An IP Address

Once you create VLAN’s on your XCP server you will find that the physical interface you used to be able to hit by an IP address no longer responds. This is because you have trunked the interface into multiple VLAN’s and need to assign IP’s to the VLAN interfaces rather than the physical interface.

Continue reading ‘Xen Cloud Platform (XCP) – Assigning A VLAN An IP Address’

Xen Cloud Platform (XCP) – Setting Up A VLAN

One very useful feature of XCP is the ability to setup VLAN networks for your virtual machines to use. This gives an administrator fine grained control on what network a machine belongs on. This will work as long as the network interface that is assigned to your VM’s is plugged into a trunked port on a switch that has been setup with VLAN tags.

Continue reading ‘Xen Cloud Platform (XCP) – Setting Up A VLAN’