The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each to gateway <b>moon</b>.
Both <b>carol</b> and <b>dave</b> request a <b>virtual IP</b> via the IKE Mode Config protocol
by using the <b>leftsourceip=%modeconfig</b> parameter. By setting the option <b>modeconfig=push</b>
on both the roadwarriors and the gateway, the Mode Config server <b>moon</b> will actively push
the configuration down to <b>carol</b> and <b>dave</b>.
<p>
<b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules that let pass the
tunneled traffic. In order to test the tunnels, <b>carol</b> and <b>dave</b> then ping the client
<b>alice</b> behind the gateway <b>moon</b>. The source IP addresses of the two pings will
be the virtual IPs <b>carol1</b> and <b>dave1</b>, respectively.
