60 (148)
Ethernet interface (local network) to use the Anybus Edge device's cellular modem internet
connection (global network).
At the top of the settings form you can enable the NAT module and configure the internal and
external network interface as well as the maximum number of mapping entries. This is the
number of connections (incoming and outgoing) that can be handled simultaneously.
Note that IP forwarding will be implicitly enabled, because it is needed in order to use
NAT. When you later disable NAT, IP forwarding will not be automatically disabled. This
can be done via
Dynamic Mappings
Dynamic mapping is used to enable devices from the local network to access the global network.
Requests from the local network will be given the Anybus Edge device's global IP address and the
replies will be routed to the respective local device. You have to configure how many minutes
dynamic mappings will be valid (time to live).
Static Mappings
Static mappings are used to make a local device's service accessible from the global network
under the Anybus Edge device's global IP address. Up to 50 static mappings can be configured.
For each you have to configure these options:
Protocol
TCP or UDP
External port
The Anybus Edge device's port at which the service should be reachable from the global network.
Internal address
The IP address of the device in the local network whose service is to be published.
Internal port
The port number at which the service is available on the device in the local network.
One-to-one Mappings
One-to-one mappings are used to statically map two networks to each other one-to-one. The
first host address in one network will be mapped to the first host address in the other network
etc. If you want to alter the destination of incoming connections from 1.2.3.0/24 (external) to
5.6.7.0/24 (internal) for example, 1.2.3.0 with subnet mask 255.255.255.0 would be used as
external address and 5.6.7.0 with subnet mask 255.255.255.0 as internal address. Up to 50 static
mappings can be configured. For each you have to configure these options:
External address:
IP address of the external network
External subnet mask:
The subnet mask used for the external addresses. Ideally
the size of both networks should be the same so that all
host addresses can be mapped.
Internal address:
IP address of the internal network
Internal subnet mask:
The subnet mask used for the internal addresses. Ideally
the size of both networks should be the same so that all
host addresses can be mapped.
Event Log Messages
The following section describes the messages that the NAT service module may log to the
. Messages are prefixed with the text
NAT service:
. Note that the NAT service module also
implements the Firewall service. So there are also some Firewall-related messages.
•
Running
The NAT service module has been successfully started.
Anybus Edge Gateway Reference Guide
SCM-1202-154 1.0 en-US
