Which VPN modes does Firewalla Red currently support?

I am a little confused. If I purchase a new Firewalla Red, will I be able to use it as a site to site VPN client or server in addition connecting with mobile VPN clients from out in the internet? Or does the Red only do site to site VPN client (in addition to vpn server for mobile clients)?

I currently have a DD-WRT router at both sites, connected via OpenVPN (site to site).  I am interested in (over time) replacing the openvpn tunnel components with Redwallas, starting with my main site's openVPN server.  I currently use PPTP servers at both sites for connecting mobile clients out in the  internet. I'd love to replace that (on both sides) with a Firewalla and switch my PPTP to OpenVPN for mobile clients.

Would I need a firewalla blue at my main site for the openvpn server to receive site to site OpenVPN connections?