The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each
to gateway <b>moon</b>. The authentication is based on distinct <b>pre-shared keys</b>
and <b>IPv4</b> addresses.
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Upon the successful establishment of the IPsec tunnels, the updown-script automatically
inserts iptables-based firewall rules that let pass the tunneled traffic.
In order to test both tunnel and firewall, both
<b>carol</b> and <b>dave</b> ping the client <b>alice</b> behind the gateway <b>moon</b>.
