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- The roadwarriors <b>carol</b> and <b>dave</b> set up an IPv4 connection each to
- gateway <b>moon</b> using the <b>IKEv1</b> and <b>IKEv2</b> key exchange protocol,
- respectively. The authentication is based on <b>X.509 certificates</b>. <b>dave</b>
- advertises the support of the IKEv2 fragmentation protocol defined in <b>RFC 7383</b>
- which prevents the IP fragmentation of the IKEv2 messages carrying large X.509
- certificates whereas <b>carol</b> announces support of non-standardized
- IKEv1 fragmentation.
- <p/>
- 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>.
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