As mentioned earlier, a VPN tunnel can be peer-to-peer or client-server, and in this example, we will simulate a VPN tunnel that might be set up if we had to connect two facilities—likely run by the same company—that both have their own private networks, but are separated by a considerable distance. There are two pfSense firewalls at the boundary of each private network and the internet; therefore, the endpoint for each tunnel will be the firewall's WAN interface, and the configurations at either end will be identical. Setting up our site-to-site IPsec tunnel involves creating Phase 1 and Phase ...
