The roadwarrior carol sets up a connection to gateway moon.
The authentication is based on X.509 certificates that are valid until
the year 2039 and are issued by a certification authority with a root ca
certificate valid until the year 2059. On 32-bit platforms, dates after
Jan 19 03:14:07 UTC 2038 cannot by represented by the time_t data type.
Thus if a time wrap-around occurs during ASN.1 to time_t conversions,
dates contained in the certificates are set to the maximum value,
i.e. to Jan 19 03:14:07 UTC 2038.
Upon the successful establishment of the IPsec tunnels, leftfirewall=yes
automatically inserts iptables-based firewall rules that let pass the tunneled traffic.
In order to test both tunnel and firewall, carol ping the client alice
behind the gateway moon.