Those settings tends to depend a lot on the router's firmware in their wording. Can you please show us some screenshots of all the VPN-related configuration options you have so we can tell you what to put where?
Otherwise, TP-Link is usually quite friendly with custom firmware, so you may also be able to flash it with DD-WRT and then simply follow our DD-WRT guide.
Comments
Those settings tends to depend a lot on the router's firmware in their wording. Can you please show us some screenshots of all the VPN-related configuration options you have so we can tell you what to put where?
Otherwise, TP-Link is usually quite friendly with custom firmware, so you may also be able to flash it with DD-WRT and then simply follow our DD-WRT guide.