The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each
to gateway <b>moon</b>. The roadwarriors' authentication is based on
<ib>Pre-Shared Keys</b> (PSK) whereas the gateway uses an <b>RSA signature</b>
(RSASIG) certified by an X.509 certificate.
Upon the successful establishment of the IPsec tunnels, <b>leftfirewall=yes</b>
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>.
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