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Open Vpn

 

Open VPN client setup

 

  • Download OpenVPN 2.0.9 from OpenVPN web site. Download prebuilt Windows installer or source distribution for Linux/Unix and Mac OS X platforms and compile it yourself.
  • Create file C:\Program Files\OpenVPN\config\openvpn.ovpn (/etc/openvpn/openvpn.conf on UNIX platforms) with the following data:
    #--8<---------------------------------------
    
    ##############################################
    
    # 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 vpn.callwithus.com 443
    
    ;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
    
    
    
    # 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 ca.crt
    
    cert ACCOUNT.crt
    
    key ACCOUNT.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
    
    #--8<---------------------------------------
    
    
    
    
    In the configuration file replace ACCOUNT in key file names with your 10-digit long account number. Login into your account to request a temporary key files (valid for 2 weeks), or purchase a 1 year key. Put the files to the same directory where openvpn.ovpn file is located.
  • Start OpenVPN client with command "openvpn --config openvpn.ovpn". The client will print several lines on the screen, the last line should be "Initialization Sequence Completed". If you get this line, you're 99% done!
  • Check the connection. From another command prompt window run "ping 10.39.0.1", you should get responses from the server.
  • Install Xten softphone, configure it as shown on Configuration page, but in "Domain" field enter "10.8.0.1" instead of "cip-tele.com" (without quotes). Enjoy SIP calls worldwide over blocked network:-)
  • The VPN will provide an access to our SIP server only and nothing else, you will not be able to access other SIP providers over our VPN link
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