How do i import the details of a file that ends in .p12 when i cant open it ? Im setting a single VPN tunnel for a single device. setup : ASUS RT-AC88U running ASUSWRT-Merlin so im trying to fill in the section "Content modification of Keys & Certificates." usually there is a need to copy and paste details from a cert right ? only for this vpn it seems the cert is in .p12 which i cant open and paste into Certificate Authority section. so how can finish off my set up below ?