ca ca.pem

ca /etc/openvpn/ca.pem

******@******64:~$ ls -la /etc/openvpn/
total 28
drwxr-xr-x   2 root root  4096 févr. 26 19:04 .
drwxr-xr-x 146 root root 12288 févr. 26 17:26 ..
-rwxrw-rw-   1 root root  1315 avril 19  2012 ca.pem
-rwxrw-rw-   1 root root  1895 avril 19  2012 client.conf
-rwxr-xr-x   1 root root  1357 mars  30  2012 update-resolv-conf

sudo openvpn /etc/openvpn/client.conf

********@*******64:~$ sudo openvpn /etc/openvpn/client.conf
Tue Feb 26 19:10:19 2013 OpenVPN 2.2.1 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Mar 30 2012
Enter Auth Username:*******
Enter Auth Password:
Tue Feb 26 19:10:32 2013 WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.
Tue Feb 26 19:10:32 2013 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Tue Feb 26 19:10:32 2013 Cannot load CA certificate file ca.pem path (null) (SSL_CTX_load_verify_locations): error:02001002:system library:fopen:No such file or directory: error:2006D080:BIO routines:BIO_new_file:no such file: error:0B084002:x509 certificate routines:X509_load_cert_crl_file:system lib
Tue Feb 26 19:10:32 2013 Exiting

ls -la /etc/openvpn/

sudo openvpn /etc/openvpn/client.conf

[##############################################
# Sample client-side OpenVPN 2.0 config file #
# for connecting to multi-client server.     #
#                                            #
# This configuration can be used by multiple #
# clients, however each client should have   #
# its own cert and key files.                #
#                                            #
# On Windows, you might want to rename this  #
# file so it has a .ovpn extension           #
##############################################

--auth-user-pass

client

dev tap
;dev tun

proto udp

remote ************.org 1194

resolv-retry infinite

nobind

# Try to preserve some state across restarts.
persist-key
persist-tun

# SSL/TLS parms.
# See the server config file for more
# description.  It's best to use
# a separate .crt/.key file pair
# for each client.  A single ca
# file can be used for all clients.
ca ca.pem
;cert client.pem
;key client.key

# Verify server certificate by checking
# that the certicate has the nsCertType
# field set to "server".  This is an
# important precaution to protect against
# a potential attack discussed here:
#  http://openvpn.net/howto.html#mitm
#
# To use this feature, you will need to generate
# your server certificates with the nsCertType
# field set to "server".  The build-key-server
# script in the easy-rsa folder will do this.
;ns-cert-type server

# If a tls-auth key is used on the server
# then every client must also have the key.
;tls-auth ta.key 1

# Select a cryptographic cipher.
# If the cipher option is used on the server
# then you must also specify it here.
;cipher x

# Enable compression on the VPN link.
# Don't enable this unless it is also
# enabled in the server config file.
comp-lzo

# Set log file verbosity.
verb 3

# Silence repeating messages
;mute 20