Following up to the post I just completed on the Cisco RV042G VPN, now I need to establish a rule in the firewall to allow VPN connections. My goal is to lock down access into any of the LAN connections until a user has authenticated through VPN. The firewall is in the default state, no changes. So when I go to add a rule to the firewall, IPSec is listed as an option. I am pretty sure I have this part right, but I won't swear to it.
What I am confused by is the Source Interface, Source IP and Destination IP.
Source Interface - I am using WAN1 as my internet connection so I assume this should be my selection here.
Source IP: Any, Single, Range - Is this to allow any external IP address connections through VPN or limit it to a single or a range?
Destination IP: Any, Single, Range - ???