VEGA MoRoS Modem - ISDN 1.3 - Manual (Page 53)

MoRoS Modem - ISDN 1.3 Functions
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The MoRoS Modem - ISDN 1.3 allows port forwarding. The MoRoS Modem - ISDN 1.3
routes incoming packets from outside of the network to certain computers within the
network. Outgoing packets of these connections from the network are being routed back
to their destinations outside of the network. At certain ports, the MoRoS Modem - ISDN
1.3 routes incoming data packets to one port of a certain destination address. You can
use rules to define which packets from the outside are routed to which addresses and
ports in the network. This means that you can make certain services available to com-
puters in the network, using the phone network.
Configuration with the web interface
To activate port forwarding, mark the checkbox "Port forwarding" in the
menu "Dial-out" (Figure 17, page 38 above, position 2).
To create a forwarding rule, select the protocol (TCP or UDP) and the port
range for the incoming packets at the MoRoS Modem - ISDN 1.3. Enter an IP
address for the routing destination in the entry field "To IP address" and a port
in the entry field "To port"; this is the address and the port where the packets
are routed to.
To delete an already created rule, activate the check box "Delete" (Figure 17,
page 38 above, position 6) and then click on "OK" (Figure 17, page 38 above,
position 5).
To deactivate an already created rule, deactivate the check box "Active"
(Figure 17, page 38 above, position 6) and then click on "OK" (Figure 17, page
38 above, position 5).
The rules in the list are processed from top to bottom. If two rules contradict
each other (for example, the same port is used twice), only the rule which is
further up in the list will be processed.
12.7.2 Defining the Exposed Host
As an option, the MoRoS Modem - ISDN 1.3 can forward all packets which do not comply
with any port forwarding rule, to a predefined computer in the LAN, also called "Exposed
Host" (for example, for diagnostic purposes). The setting for the "Exposed Host" is in
principle a port forwarding rule without criteria, which therefore applies to all packets.
The "Exposed Host" contains all packets which have not been requested by the local net-
work of the MoRoS Modem - ISDN 1.3 or which have not been forwarded to a participant
in the local network by a port forwarding rule. If no "Exposed Host" is configured, these
incoming packets are discarded.
Configuration with the web interface
To define an "Exposed Host", enter the IP address of a computer in the LAN in
the entry field "Exposed Host" in the menu "Dial-out" (Figure 17, page 38
above, position 4). This IP address must be accessible to all ports from the out-
side.
Save the settings by clicking "OK" (Figure 17, page 38 above, position 5).