| The roadwarriors <b>carol</b> and <b>dave</b> set up a connection to gateway <b>moon</b>. |
| At the outset the gateway authenticates itself to the clients by sending |
| an IKEv2 <b>digital signature</b> accompanied by an X.509 certificate. |
| <p/> |
| Next the clients use the GSM <i>Subscriber Identity Module</i> (<b>EAP-SIM</b>) |
| method of the <i>Extensible Authentication Protocol</i> to authenticate themselves. |
| In this scenario triplets from the file <b>/etc/ipsec.d/triplets.dat</b> are used |
| instead of a physical SIM card. |
| <p/> |
| The gateway forwards all EAP messages to the RADIUS server <b>alice</b> |
| which also uses static triplets. |
| <p/> |
| The roadwarrior <b>dave</b> sends wrong EAP-SIM triplets. As a consequence |
| the RADIUS server <b>alice</b> returns an <b>Access-Reject</b> message |
| and the gateway <b>moon</b> sends back <b>EAP_FAILURE</b>. |
