サーバ側での作業 で生成した、ca.crt およびクライアント用の client.crt, client.key ファイルをセキュアな手段で MA-E3xx に持ってきます。

上記ファイルは /etc/openvpn/keys/ 以下に配置します。

root@plum:~# ls -l /etc/openvpn/keys/
total 16
-rw-r--r-- 1 root root 1814 Feb 25 15:58 ca.crt
-rw-r--r-- 1 root root 5600 Feb 25 15:59 mae3xx_1.crt
-rw------- 1 root root 1704 Feb 25 15:59 mae3xx_1.key

OpenVPN クライアント用の設定ファイルを作成します。

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           #
##############################################
# Specify that we are a client and that we
# will be pulling certain config file directives
# from the server.
client
 
# Use the same setting as you are using on
# the server.
# On most systems, the VPN will not function
# unless you partially or fully disable
# the firewall for the TUN/TAP interface.
;dev tap
dev tun
 
# Windows needs the TAP-Win32 adapter name
# from the Network Connections panel
# if you have more than one. On XP SP2,
# you may need to disable the firewall
# for the TAP adapter.
;dev-node MyTap
 
# Are we connecting to a TCP or
# UDP server? Use the same setting as
# on the server.
;proto tcp
proto udp
 
# The hostname/IP and port of the server.
# You can have multiple remote entries
# to load balance between the servers.
remote openvpn-server.example.jp 1194
 
# Choose a random host from the remote
# list for load-balancing. Otherwise
# try hosts in the order specified.
;remote-random
 
# Keep trying indefinitely to resolve the
# host name of the OpenVPN server. Very useful
# on machines which are not permanently connected
# to the internet such as laptops.
resolv-retry infinite
 
# Most clients don't need to bind to
# a specific local port number.
nobind
 
# Downgrade privileges after initialization (non-Windows only)
;user nobody
;group nobody
 
# Try to preserve some state across restarts.
persist-key
persist-tun
 
# If you are connecting through an
# HTTP proxy to reach the actual OpenVPN
# server, put the proxy server/IP and
# port number here. See the man page
# if your proxy server requires
# authentication.
;http-proxy-retry # retry on connection failures
;http-proxy [proxy server] [proxy port #]
 
# Wireless networks often produce a lot
# of duplicate packets. Set this flag
# to silence duplicate packet warnings.
;mute-replay-warnings
 
# 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 /etc/openvpn/keys/ca.crt
cert /etc/openvpn/keys/mae3xx_1.crt
key /etc/openvpn/keys/mae3xx_1.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
 
fragment 1426
mssfix

※ remote openvpn-server.example.jp 1194 の行は、立ち上げたサーバのアドレスおよびポート番号に変更する必要があります。