impact libvirt nat

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=VILocJOfJ_w

Examine the impact of an isolated and NATted default • network, created by libvirt, on iptables. • Links: • https://github.com/aberends/screencas... • https://libvirt.org/formatnetwork.html • No default network: • virsh net-destroy default • virsh net-undefine default • Put output of: • iptables -n -v --line-numbers -L FORWARD • in the file: • filter • Put the output of: • iptables -t nat -n -v --line-numbers -L POSTROUTING • in the file: • nat • Show that we have no default network: • virsh net-list --all | grep default • Isolated default network: • cat isolated_default.xml • virsh net-define isolated_default.xml • virsh net-start default • Put the output of: • iptables -n -v --line-numbers -L FORWARD • in the file: • isolated_filter • Put the output of: • iptables -t nat -n -v --line-numbers -L POSTROUTING • in the file: • isolated_nat • Show that the default network now exists: • virsh net-list --all | grep default • NATted default network: • cat nat_default.xml • virsh net-destroy default • virsh net-undefine default • virsh net-define nat_default.xml • virsh net-start default • Put the output of: • iptables -n -v --line-numbers -L FORWARD • in: • nat_filter • Put the output of: • iptables -t nat -n -v --line-numbers -L POSTROUTING • in: • nat_nat • Show that the default network exists: • virsh net-list --all | grep default • Difference no (default network) and isolated: • vim -o filter isolated_filter • vim -o nat isolated_nat # no difference • • Difference isolated and nat: • vim -o isolated_filter nat_filter • vim -o isolated_nat nat_nat

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