per la configurazione dovrebbe essere ok, l'ho copiata pari pari sul mio NB e funziona...
ell-3721-orlangio sbtest # openvpn setteb.ovpn
Mon Jun 29 17:37:10 2015 OpenVPN 2.3.2 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [eurephia] [MH] [IPv6] built on Dec 1 2014
Mon Jun 29 17:37:10 2015 Socket Buffers: R=[212992->131072] S=[212992->131072]
Mon Jun 29 17:37:10 2015 UDPv4 link local: [undef]
Mon Jun 29 17:37:10 2015 TLS: Initial packet from [AF_INET]
5.189.145.140:1194, sid=c31b3dc4 90abbb99
Mon Jun 29 17:37:11 2015 VERIFY OK: depth=1, C=IT, ST=LU, L=Viareggio, O=Settebello, OU=settebelloOU, CN=settebello, name=settebelloINFO, emailAddress=
orlangio@gmail.comMon Jun 29 17:37:11 2015 VERIFY OK: depth=0, C=IT, ST=LU, L=Viareggio, O=Settebello, OU=settebelloOU, CN=settebelloSrv1, name=settebelloINFO, emailAddress=
orlangio@gmail.comMon Jun 29 17:37:12 2015 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
Mon Jun 29 17:37:12 2015 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Jun 29 17:37:12 2015 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
Mon Jun 29 17:37:12 2015 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Jun 29 17:37:12 2015 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
Mon Jun 29 17:37:12 2015 [settebelloSrv1] Peer Connection Initiated with [AF_INET]
5.189.145.140:1194Mon Jun 29 17:37:14 2015 SENT CONTROL [settebelloSrv1]: 'PUSH_REQUEST' (status=1)
Mon Jun 29 17:37:14 2015 PUSH: Received control message: 'PUSH_REPLY,route 172.31.234.0 255.255.255.0,topology net30,ping 10,ping-restart 120,ifconfig 172.31.234.6 172.31.234.5'
Mon Jun 29 17:37:14 2015 OPTIONS IMPORT: timers and/or timeouts modified
Mon Jun 29 17:37:14 2015 OPTIONS IMPORT: --ifconfig/up options modified
Mon Jun 29 17:37:14 2015 OPTIONS IMPORT: route options modified
Mon Jun 29 17:37:14 2015 TUN/TAP device tun0 opened
Mon Jun 29 17:37:14 2015 TUN/TAP TX queue length set to 100
Mon Jun 29 17:37:14 2015 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Mon Jun 29 17:37:14 2015 /sbin/ip link set dev tun0 up mtu 1500
Mon Jun 29 17:37:14 2015 /sbin/ip addr add dev tun0 local 172.31.234.6 peer 172.31.234.5
Mon Jun 29 17:37:14 2015 /sbin/ip route add
172.31.234.0/24 via 172.31.234.5
Mon Jun 29 17:37:14 2015 Initialization Sequence Completed