| A connection between the subnets behind the gateways <b>moon</b> and <b>sun</b> is set up. | |
| The authentication is based on <b>Preshared Keys</b> (PSK). Upon the successful | |
| establishment of the IPsec tunnel, automatically inserted iptables-based firewall rules | |
| let pass the tunneled traffic. In order to test both tunnel and firewall, client <b>alice</b> | |
| behind gateway <b>moon</b> pings client <b>bob</b> located behind gateway <b>sun</b>. |