| The roadwarriors <b>carol</b> and <b>dave</b> set up a connection to gateway <b>moon</b>. |
| The authentication is based on Pre-Shared Keys (<b>PSK</b>) followed by extended |
| authentication (<b>XAUTH</b>) of <b>carol</b> and <b>dave</b> based on user names and passwords. |
| <p> |
| Upon the successful establishment of the IPsec tunnel, the updown-script automatically |
| inserts iptables-based firewall rules that let pass the tunneled traffic. |
| In order to test both tunnel and firewall, <b>carol</b> and <b>dave</b> ping the client |
| <b>alice</b> behind the gateway <b>moon</b>. |
