Endress+Hauser Fieldgate FXA42, Руководство по эксплуатации

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Operation Fieldgate FXA42
96 Hauser
Static mappings
Static mappings are used to make a local device's services accessible from the global
network under the global IP address of the Fieldgate FXA42. Up to 10 static mappings can
be configured. You have to configure the following options for each mapping:
Option Description
Protocol TCP or UDP
External port The port of the Fieldgate FXA42 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 should be reachable from the
global network.
Internal port The port number at which the service is available on the device in the local network.
Event log messages
The following section describes the messages that the NAT service unit may log to the
event log. The messages are prefixed with the text NAT service :
The NAT service also implements the firewall service, which is why there are also
some messages related to the Firewall function.
Running
The NAT service unit has been successfully started.
<x> static mapping(s) read from configuration
The static mapping entries have been successfully read from the configuration. The
message also shows the number of static mappings read.
No free mapping entry available for incoming connection from internal interface
A client from the internal network tried to open a connection through the NAT service unit
but there was no free entry in the mapping table. Therefore the connection could not be
established. Increase the maximum number of mappings if possible.
No free firewall rule entry available for outgoing connection
A new dynamic rule has to be added to the firewall to allow an outgoing connection to be
established. However, there was no free entry in the internal rules table. Therefore the
connection could not be established. Increase the maximum number of rules if possible.
8.4.16 Firewall
The device features a firewall which improves the system's security by analyzing network
traffic and blocking disallowed traffic.