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Latest Xen Project Blog Posts

How To Shrink Attack Surfaces with a Hypervisor

A software environment’s attack surface is defined as the sum of points in which an unauthorized user or malicious adversary can enter or extract data. The smaller the attack surface, the better. Linux.com recently sat down with Doug Goldstein (https://github.com/cardoe or @doug_goldstein) to discuss how companies can use hypervisors to reduce attack surfaces and why […]

Request for Comment: Scope of Vulnerabilities for which XSAs are issued

Issuing advisories has a cost: It costs the security team significant amounts of time to craft and send the advisories; it costs many of our downstreams time to apply, build, and test patches; and it costs many of our users time to decide whether to do an update, and if so, to test and deploy […]

Tips and Tricks for Making VM Migration More Secure

A challenge for any cloud installation is the constant tradeoff of availability versus security. In general, the more fluid your cloud system (i.e., making virtualized resources available on demand more quickly and easily), the more your system becomes open to certain cyberattacks. This tradeoff is perhaps most acute during active virtual machine (VM) migration, when […]

Latest Planet Blog Posts

XenServer High-Availability Alternative HA-Lizard

WHY HA AND WHAT IT DOES XenServer (XS) contains a native high-availability (HA) option which allows quite a bit of flexibility in determining the state of a pool of hosts and under what circumstances Virtual Machines (VMs) are to be restarted on alternative hosts in the event of the loss of the ability of a host to be able to serve VMs. HA is a very useful feature that protects VMs from staying failed in the event of a server crash or other incident that makes VMs inaccessible. Allowing a XS pool to help itself maintain the functionality of VMs is...

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