All the addresses from the range are used, not just those that are in use on the host. https://bugzilla.redhat.com/show_bug.cgi?id=1079917 --- docs/formatnetwork.html.in | 2 ++ 1 file changed, 2 insertions(+) diff --git a/docs/formatnetwork.html.in b/docs/formatnetwork.html.in index 7cf3f69..6abed8f 100644 --- a/docs/formatnetwork.html.in +++ b/docs/formatnetwork.html.in @@ -200,6 +200,8 @@ <p><span class="since">Since 1.0.3</span> it is possible to specify a public IPv4 address and port range to be used for the NAT by using the <code>&lt;nat&gt;</code> subelement. + Note that all addresses from the range are used, not just those + that are in use on the host. The address range is set with the <code>&lt;address&gt;</code> subelements and <code>start</code> and <code>stop</code> attributes: