以前のリビジョンの文書です
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。
File | 内容 |
---|---|
ca.crt | ルートCAの証明書 |
client.crt | クライアントの証明書 |
client.key | クライアントの秘密鍵 |
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。
############################################## # 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。
設定変更を systemd に通知するため、“systemctl daemon-reload” を行ってから起動します。
root@plum:~# systemctl daemon-reload root@plum:~# systemctl start openvpn
設定がきちんとできていれば、tun0 I/F が up して通信ができるようになります。
root@plum:~# ifconfig tun0 tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500 inet 10.8.0.6 netmask 255.255.255.255 destination 10.8.0.5 inet6 fe80::7031:7640:14c0:272 prefixlen 64 scopeid 0x20<link> unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 100 (UNSPEC) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 4 bytes 304 (304.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0