pfSense

I think using ipv4 in the openvpn conf should not generate the attribute tun-ipv6 attribute and not load the ipv6 module for the virtual tunnel of openvpn

dev ovpns1 dev-type tun tun-ipv6 dev-node /dev/tun1 writepid /var/run/openvpn_server1.pid #user nobody #group nobody script-security 3 daemon keepalive 10 60 ping-timer-rem persist-tun persist-key proto udp cipher AES-128-CBC up /usr/local/sbin/ovpn-linkup down /usr/local/sbin/ovpn-linkdown local 10.10.10.12 ifconfig 10.0.8.1 10.0.8.2 lport 1194 management /var/etc/openvpn/server1.sock unix max-clients 1 route 192.168.3.0 255.255.255.0 secret /var/etc/openvpn/server1.secret comp-lzo