Chapter 8 Setting Up The Firewall; Defining Firewall Rules; Adding Port Forwarding Rules; Adding Outbound Traffic Rules - Multitech MultiConnect rCell 100 User Manual

Chapter 8 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.
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MultiConnect rCell 100 MTR-H5 User Guide
CHAPTER 8 SETTING UP THE FIREWALL
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