Currently I'm evaluating Proxmox VE to see how it compares with other virtualization solutions. One thing that is very nice about Xen is its serial console access to guests (it works out of the box for paravirtualized hosts). It allows to login to a guest even when it's network-disconnected (i.e. you gave it a wrong IP address) or when you have problems accessing the guest with a VNC console (your connection is very slow and the only reasonable access is SSH through the host). For example, to access a serial console on a guest from a Xen host one would do: [root@xen2 mangoo]# xm console mysql3 Kernel 18.104.22.168-1-xenU on an i686 / hvc0 mysql3 login: This_is_a_guest_login_prompt! I couldn't find any documentation on how to achieve it with KVM guests on Proxmox. Anyone using it? It is implemented through a "-serial" option in KVM.