| A tunnel connecting the subnets behind the gateways <b>moon</b> and <b>sun</b>, | |
| respectively, is automatically established by means of the setting | |
| <b>auto=start</b> in ipsec.conf. The connection is tested by client <b>alice</b> | |
| behind gateway <b>moon</b> pinging the client <b>bob</b> located behind | |
| gateway <b>sun</b>. | |
| <p> | |
| <b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules | |
| that let pass the tunneled traffic. |