local 192.168.115.249 port 20021 proto udp dev tap dev-node VPN21 ifconfig 192.168.115.221 255.255.255.0 secret abcdefghijlkm-nopqrst-21.key cipher AES-256-CBC comp-lzo ; Hold tunnel with more strength keepalive 10 60 ping-timer-rem persist-tun persist-key