SETTING UP THE FIREWALL
MultiConnect
®
rCell 100 MTR-LTE User Guide
47
Chapter 9 – Setting Up the Firewall
Defining firewall rules
The router's firewall enforces a set of rules that determine how incoming and outgoing packets are handled. By
default, all outbound traffic originating from the LAN is allowed to pass through the firewall, and all inbound traffic
originating from external networks is dropped. This effectively creates a protective barrier between the LAN and
all other networks. For additional information, see:
Adding Port Forwarding Rules
Adding Devices
Advanced Settings
Adding Port Forwarding Rules
For a device within the LAN to be visible from the internet or from an outside network, create a forwarding rule to
allow incoming packets to reach the device.
1.
Go to
Firewall > Settings
to display the
Firewall
window.
2.
In the
Port Forwarding
group, click
Add Rule
.
3.
In the
Inbound Forwarding Rule
dialog box, enter a name for the rule and optionally, a description. Click
Next
.
4.
In the second
Inbound Forwarding Rule
dialog box, in the
External WAN Port(s)
field, type the port(s) to
be forwarded. Common ports are listed in the field's attached drop-down list and are exposed once you
enter a character. Type
ANY
to forward all ports.
5.
In the
Destination LAN IP
field, type the IP address of the device that packets will be forwarded to. The
attached drop-down list contains DHCP leased and Saved Network addresses.
6.
In the
Destination LAN Port(s)
field, type the port to which packets are translated. If there is a range of
ports, the ending port is automatically set. The Destination LAN ending port is based on the Destination
LAN starting port and the range provided in the
External WAN Port(s)
field.
7.
From the
Protocol
drop-down list, select the protocol of the messages that can be forwarded.
8.
A default filter allowing forwarded packets through the firewall is automatically created. If desired, you
can use the
Advanced Settings
mode of the Port Forwarding wizard to further restrict packets based on
source address and source ports using the
Inbound Filter Rule
. In most cases, this is not necessary.
9.
Click
Finish
.
10.
To save your changes, click
Save and Restart
.
Adding Outbound Traffic Rules
To prevent a device within the LAN from communicating with a device in an external network, you must establish a
firewall rule to drop packets destined to the external device.
1.
Click
Add Rule
in the
Outbound Traffic
section.
2.
Enter a name for the rule and optionally, a description. Click
Next
.
3.
In the second
Filter Rule
dialog box, in the
Destination IP
field, type the IP address of the device or
network that packets are to be sent to. Type
ANY
if the destination address does not matter.
4.
In the
Destination Mask
field, type the network mask of the destination network.
