I am using XenServer as my private solution for my network. It’s fast, reliable, open-source and free (as in free beer). I am sort of a fanboy. That said we are using XenServer at work, too.
This hotfix supports the upgrade of OpenSSL package to version 1.0.1.
stunnel-4.15-17.x86_64.rpm make-3.81-3.el5.x86_64.rpm openssl-wrapper-0.1-59.x86_64.rpm openssl-xs-1.0.1e-42.xs15.x86_64.rpm ca-certificates-2012.87-1.noarch.rpm openssl-xs-libs-1.0.1e-42.xs15.x86_64.rpm openvswitch-2.1.3-13.7579.x86_64.rpm xenserver-transfer-vm-6.5.0-116122c.noarch.rpm
The bold one however, introduces some issues. If you (like everyone) installed extra packages in the Dom0 (the hypervisor) and maybe even used packages from epel then stuff will break apart. For example: