It appears that PPTP is missing from the VPN options in Sierra. Do others find this? Any other options available if this is the case?
Late to the table I know - just catching up with the forums!
There is a free firewall on the market, one that is EAL 4+ and enterprise grade, supporting WebCaching Firewall and L2TP - have a search for Sophos UTM Home Edition.
Or the Sophos XG Home Edition.