Digi TransPort WR11 User Manual page 529

Configuring Virtual Private Networking (VPN)
the second IP address in the block of four. For example, the IP address 192.168.0.1, if
configured as a server, or 192.168.0.2, if configured as a client.
Destination host a.b.c.d
Required only when the router is configured as an OpenVPN client. This is the IP address of the
OpenVPN server.
Link socket interface x,y
If configured, OpenVPN sockets are only allowed to/from this interface and the routing table
will be ignored. When set to Auto, the OpenVPN sockets use the routing table to identify the
best interface to use.
Get link socket source address from this interface x,y
The values in these two text boxes define the interface (Auto, PPP, ETH) and the instance
number of the interface to use as a source address for IP sockets when not using the interface
that the socket was created on.
Even when this parameter is not configured, the router uses the IP address from the interface
on which the socket was created. It uses the source address specified in this parameter only if
it will cause the traffic to match an Eroute and therefore be sent using IPsec or GRE.
MTU
Used to set the Maximum Transmit Unit for the OpenVPN instance, in bytes. The default
setting is 1400.
Metric
The connected metric, changing this value will alter the metric of dynamic routes created
automatically for this interface.
NAT mode
Selects whether to use IP Network Address Translation (NAT) or Network Address and Port
Translation (NAPT) at the Ethernet interface. When the parameter is set to disabled, no NAT
will occur.
IP analysis
When enabled, the un-encapsulated IP traffic will be captured into the analyser trace.
Firewall
Enables or disables Firewall script processing for this interface.
IGMP
Enables or disables the transmission and reception of IGMP packets on this interface. IGMP
advertises members of multicast groups. If IGMP is enabled, and a member of a multicast
group is discovered on this interface, multicast packets for this group received on other
interfaces are sent out this interface.
Digi TransPort® Routers User Guide
Configure OpenVPN
529