How to set up an IPSEC site-to-site VPN with pfsense

I take a look at how to setup a secure ipsec site-to-site VPN connection using pfSense open source firewall. I explain how to set up the phase 1 IKEv2 connection and then how to set up multiple phase 2 connections in order to allow multi subnets or vlans to pass over the vpn, including lookg at the necessary firewall rules to apply to the ipsec interface.