Build CA(Criteria Agent) certificate, generated ca.crt will be saved at C：\Program Files\OpenVPN\easy-rsa\pki, and the ca.key will be saved at C：\Program Files\OpenVPN\easy-rsa\pki\private.
1
./easyrsa build-ca nopass
Generate Server crt and key, server.crt will be saved at C：\Program Files\OpenVPN\easy-rsa\pki\issued and the server.key will be saved at C：\Program Files\OpenVPN\easy-rsa\pki\private.
1
./easyrsa build-client-full client nopass
Generate Diffie-Hellman key
1
./easyrsa gen-dh
Build server.ovpn config file: Sample config files locate at C：\Program Files\OpenVPN\sample-config, you should copy server.ovpn to C：\Program Files\OpenVPN\config
1 2 3 4
port 1194 dh dh.pem duplicate-cn ;tls-auth ta.key 0
Copyca.crt，dh.pem，server.crt and server.key to directory C：\Program Files\OpenVPN\config.
############################################## # Sample client-side OpenVPN 2.6 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 58.18.73.71 1194 ;remote my-server-2 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
# 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 ca.crt ;cert client.crt ;key client.key
# Verify server certificate by checking that the # certificate has the correct key usage set. # 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 keyUsage set to # digitalSignature, keyEncipherment # and the extendedKeyUsage to # serverAuth # EasyRSA can do this for you. remote-cert-tls server
# Allow to connect to really old OpenVPN versions # without AEAD support (OpenVPN 2.3.x or older) # This adds AES-256-CBC as fallback cipher and # keeps the modern ciphers as well. ;data-ciphers AES-256-GCM:AES-128-GCM:?CHACHA20-POLY1305:AES-256-CBC
# If a tls-auth key is used on the server # then every client must also have the key. ;tls-auth ta.key 1
