а вот что валится в лог DD-WRT:
Mar 22 10:42:53 DD-WRT daemon.warn openvpn[1498]: WARNING: Using --management on a TCP port WITHOUT passwords is STRONGLY discouraged and considered insecure
Mar 22 10:42:53 DD-WRT daemon.warn openvpn[1498]: WARNING: file '/tmp/openvpn/ta.key' is group or others accessible
Mar 22 10:42:53 DD-WRT daemon.notice openvpn[1498]: OpenVPN 2.4.6 mipsel-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Oct 10 2018
Mar 22 10:42:53 DD-WRT daemon.notice openvpn[1498]: library versions: OpenSSL 1.1.1 11 Sep 2018, LZO 2.09
Mar 22 10:42:53 DD-WRT daemon.notice openvpn[1501]: MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:14
Mar 22 10:42:53 DD-WRT daemon.warn openvpn[1501]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Mar 22 10:42:53 DD-WRT daemon.notice openvpn[1501]: Diffie-Hellman initialized with 2048 bit key
Mar 22 10:42:53 DD-WRT daemon.err openvpn[1501]: OpenSSL: error:0909006C:lib(9):func(144):reason(108)
Mar 22 10:42:53 DD-WRT daemon.err openvpn[1501]: OpenSSL: error:140AD009:lib(20):func(173):reason(9)
Mar 22 10:42:53 DD-WRT daemon.err openvpn[1501]: Cannot load certificate file /tmp/openvpn/cert.pem
Mar 22 10:42:53 DD-WRT daemon.notice openvpn[1501]: Exiting due to fatal error
daemon.err - подсвечено красным
daemon.notice - желтым