Jan 26 19:04:04 unknown kern.info kernel: tun: Universal TUN/TAP device driver, 1.6 Jan 26 19:04:04 unknown kern.info kernel: tun: (C) 1999-2004 Max Krasnyansky Jan 26 19:04:04 unknown kern.info kernel: ADDRCONF(NETDEV_UP): tun21: link is not ready Jan 26 19:04:04 unknown kern.info kernel: device tun21 entered promiscuous mode Jan 26 19:04:04 unknown daemon.warn openvpn[1507]: WARNING: file '/opt/etc/openvpn/server1/server.key' is group or others accessible Jan 26 19:04:04 unknown daemon.notice openvpn[1507]: OpenVPN 2.4.8 arm-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Jan 19 2020 Jan 26 19:04:04 unknown daemon.notice openvpn[1507]: library versions: OpenSSL 1.1.1d 10 Sep 2019, LZO 2.10 Jan 26 19:04:04 unknown daemon.notice openvpn[1508]: Diffie-Hellman initialized with 2048 bit key Jan 26 19:04:04 unknown daemon.err openvpn[1508]: OpenSSL: error:140AB18E:lib(20):func(171):reason(398) Jan 26 19:04:04 unknown daemon.err openvpn[1508]: Cannot load certificate file /opt/etc/openvpn/server1/server.crt Jan 26 19:04:04 unknown daemon.notice openvpn[1508]: Exiting due to fatal error