You just set up a vpn client on a windows computer to work with a pfsense vpn server. you now want to make an ipsec connection to the server using ikev2. what is the first step you must take? import a certificate file from the pfsense system. authenticate with the pfsense server. revoke a certificate from the pfsense server certificate authority (ca). add a route to the connecting ip address of the ipsec firewall.