Qemu is the only platform where we limit the binding of UDP
tunnel to a specific host. It's probably much secure and cleaner
but we have scenario where we need one port bind to an IP and
another bind to a different IP (Link between qemu and and a VM on the
GNS3 VM)
This allow the use of 134fed8fc5d5f130275a7a1f19613427548ceb57