The roadwarrior <b>carol</b> sets up a connection to gateway <b>moon</b>.
At the outset the gateway authenticates itself to the client by sending
an IKEv2 <b>RSA signature</b> accompanied by a certificate.
<b>carol</b> then uses the <i>Extensible Authentication Protocol</i>
in association with a <i>GSM Subscriber Identity Module</i>
(<b>EAP-SIM</b>) to authenticate against the gateway <b>moon</b>.
In this scenario triplets from the file <b>/etc/ipsec.d/triplets.dat</b>
are used instead of a physical SIM card on the client <b>carol</b> and
the gateway forwards all EAP messages to the RADIUS server <b>alice</b>
which also uses static triplets.