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 - ???
Source Interface - I've used this router before and there are 2 WAN ports. You need to select which WAN port the traffic is coming from.
Source IP: Keep it ANY because you want your remote users to connect from anywhere via VPN. You can limit the VPN from an IP range or an IP if for example you're connecting a remote branch to corporate head office (router to router VPN) so you will want to allow only a certain IP range or even only one IP address to connect to the H.O.
Destination IP: Any or select a specific IP range (if you only want them to be able to access a certain servers in a certain IP range then you can specify. Otherwise leave it as ANY).