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							- The roadwarriors <b>alice</b> and <b>venus</b> sitting behind the NAT router <b>moon</b> set up
 
- tunnels to gateway <b>sun</b>. UDP encapsulation is used to traverse the NAT router.
 
- Each roadwarrior shares its own Pre-Shared Key (PSK) with the gateway <b>sun</b>.
 
- <p/>
 
- <b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules that let pass
 
- the tunneled traffic. In order to test the tunnel, the NAT-ed hosts <b>alice</b> and <b>venus</b>
 
- ping the client <b>bob</b> behind the gateway <b>sun</b>.
 
 
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