Digi X2 - Manual (Page 92)

C o n f i g u r a t i o n t h r o u g h t h e w e b i n t e r f a c e
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Forward protocol connections from external networks to the following
internal devices: Enables protocol forwarding to the specified internal devices.
Currently, the only IP protocols for which protocol forwarding is supported are:
– Generic Routing Encapsulation (GRE, IP protocol 47)
– Encapsulating Security Payload (ESP, IP protocol 50, tunnel mode only).
These are routing protocols that are used to route (tunnel) various types of
information between networks. If your network needs to use the GRE or ESP
protocol between the public and private networks, enable this feature
accordingly.
Forward TCP/UDP connections from external networks to the following
internal devices: Specifies a list of connections based on a specific IP port and
where those connections should be forwarded to. Typically the connecting
devices come from the public side of the network and are redirected to a device
on the private side of the network.
Example
For example, to enable port forwarding of RealPort data (network port 771) on a
Digi Connect WAN VPN to a Digi Connect SP with an IP address of 10.8.128.10, you
would do the following:
Make sure the Enable IP Routing checkbox is checked.
In the Forward TCP/UDP connections from external networks to the
following internal devices section, enter the port forwarding information as
follows, and click Add: