The roadwarriors carol and dave restart a connection each
to gateway moon. The authentication is based on X.509 certificates.
Both carol and dave request a virtual IP via the IKEv2 configuration
payload. The gateway moon reassigns the static and reserved virtual IP addresses
from a pool named bigpool predefined in the SQL database.
Upon the successful establishment of the IPsec tunnels, automatically inserted
iptables-based firewall rules let pass the tunneled traffic.
In order to test both tunnel and firewall, both carol and dave ping
the client alice behind the gateway moon.