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The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each to gateway <b>moon</b>.
At the outset the gateway authenticates itself to the clients by sending an IKEv2
<b>RSA signature</b> accompanied by a certificate.
<b>carol</b> and <b>dave</b> then set up an <b>EAP-TTLS</b> tunnel each via <b>moon</b> to
the FreeRADIUS server <b>alice</b> authenticated by an X.509 AAA certificate.
The strong EAP-TTLS tunnel protects the ensuing weak client authentication based on <b>EAP-MD5</b>.
In a next step the EAP-TNC protocol is used within the EAP-TTLS tunnel to determine the
health of <b>carol</b> and <b>dave</b> via the <b>IF-TNCCS 1.1</b> client-server interface.
The IMC and IMV communicate using the <b>IF-M</b> protocol defined by <b>RFC 5792 PA-TNC</b>.
<p>
<b>carol</b> passes the health test and <b>dave</b> fails. Based on these measurements <b>carol</b>
is authenticated successfully and is granted access to the subnet behind <b>moon</b> whereas
<b>dave</b> fails the layered EAP authentication and is rejected.
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