CautionThis article applies to Shorewall 3.0 and later. If you are running a version of Shorewall earlier than Shorewall 3.0.0 then please see the documentation for that release. Xen is a paravirtualization tool that allows you to run multiple virtual machines on one physical machine. It is available on a wide number of platforms and is included in recent SUSE™ distributions. Xen refers to the vir