The virt-manager application is a desktop user interface for managing virtual machines through libvirt. It primarily targets KVM VMs, but also manages Xen and LXC (linux containers).

https://virt-manager.org/

To install on Ubuntu, run

apt-get install virt-manager

To connect to remote KVM or Xen server, you need to install libvirt on remote server.

On a CentOS Xen Server, i installed it with

yum -y install libvirt

Start libvirtd with

service libvirtd start

# service libvirtd status
libvirtd (pid  18663) is running...
# 

Now you can connect to the server with virt-manager and create/manage Virtual Machines.

• KVM Guest forwarding port to Host