An IPsec <b>AH transport-mode</b> connection using HMAC_SHA256_128 between the hosts
<b>moon</b> and <b>sun</b> is set up.The authentication is based on <b>X.509 certificates</b>.
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Upon the successful establishment of the AH transport connection, the updown script automatically
inserts iptables-based firewall rules that let pass the protected traffic.
In order to test the host-to-host connection <b>moon</b> pings <b>sun</b>.
