Moxa V2401-CE [56/108] Openvpn

V2401/2402 Series Linux User’s Manual Managing Communications

3-29

ATTENTION

Visit the following links for more information about RFC 1213 MIB-II.

http://www.ietf.org/rfc/rfc1213.txt

OpenVPN

OpenVPN provides two types of tunnels for users to implement VPNS: Routed IP Tunnels and

Bridged Ethernet Tunnels.

An Ethernet bridge is used to connect different Ethernet networks together. The Ethernets are

bundled into one bigger, “logical” Ethernet. Each Ethernet corresponds to one physical interface

(or port) that is connected to the bridge.

On each OpenVPN machine, you should carry out configurations in the /etc/openvpn directory,

where script files and key files reside. Once established, all operations will be performed in that

directory.

Ethernet Bridging for Private Networks on Different Subnets

1. Set up four machines, as shown in the following diagram.

Host A represents the machine that belongs to OpenVPN A, and Host B represents the

machine that belongs to OpenVPN B. The two remote subnets are configured for a different

range of IP addresses. When this configuration is moved to a public network, the external

interfaces of the OpenVPN machines should be configured for static IPs, or connected to

another device (such as a firewall or DSL box) first.