Openvpn - Tripp Lite B092-016 Owner's Manual

Chapter 4: Serial Port, Device and User Configuration
• In Right Address enter the public IP or DNS address of the remote end of the tunnel (only if the remote end has a static
or dyndns address). Otherwise leave this blank
• If the VPN gateway is serving as a VPN gateway to a local subnet (e.g. the Console Server has a Management LAN
configured) enter the private subnet details in Left Subnet. Use the CIDR notation (where the IP address number is
followed by a slash and the number of 'one' bits in the binary notation of the netmask). For example 192.168.0.0/24
indicates an IP address where the first 24 bits are used as the network address. This is the same as 255.255.255.0. If
the VPN access is only to the console server itself and to its attached serial console devices then leave Left Subnet blank
• If there is a VPN gateway at the remote end, enter the private subnet details in Right Subnet. Again use the CIDR
notation and leave blank if there is only a remote host
• Select Initiate Tunnel if the tunnel connection is to be initiated from the Left console server end. This can only be
initiated from the VPN gateway (Left) if the remote end was configured with a static (or dyndns) IP address
• Click Apply to save changes
Note: It is essential the configuration details set up on the Console Server (referred to as the Left or Local host) exactly
matches the set up entered when configuring the Remote (Right) host/gateway or software client.

4.10 OpenVPN

Console Servers also include OpenVPN which is based on TSL (Transport Layer Security) and SSL (Secure Socket Layer).
With OpenVPN, it is easy to build cross-platform, point-to-point VPNs using x509 PKI (Public Key Infrastructure) or custom
configuration files.
OpenVPN allows secure tunneling of data through a single TCP/UDP port over an unsecured network, thus providing secure
access to multiple sites and secure remote administration to a console server over the Internet.
OpenVPN also allows the use of Dynamic IP addresses by both the server and client thus providing client mobility. For example,
an OpenVPN tunnel may be established between a roaming windows client and a Console Server within a data centre.
Configuration of OpenVPN can be complex so Tripp Lite provides a simple GUI interface for basic set up as described below.
However for more detailed information on configuring OpenVPN Access server or client refer to the HOW TO and FAQs at
http://www.openvpn.net
58