I have a 3 site WAN. Site 1 & 2 have a cisco 871 router each which connects to site 3. Site 3 has an ME3400. All three sites are linked via a WAN so there's no internet.
I am wanting to enable VPN on each device in order to protect the traffic. With the given devices can this be done? Will the ME3400 VPN work with the 871s?