Setting Up Firewalls; Defining Firewall Rules; Adding Forwarding Rules; Adding Outbound Traffic Rules - Multitech multiconnect rcell 100 series Configuration Manual

Setting up firewalls
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.
Adding 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. In the Port Forwarding group, click Add Rule.
2. Enter a name and description. Click Next.
3. In the IP Forwarding DNAT pane, enter the following:
In the External WAN Ports 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.
In the Destination LAN IP field, type the IP address of the device packets will be forwarded to. The
attached drop‐down list contains DHCP leased and Saved Network addresses.
In the Destination LAN Ports 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.
From the Protocol drop‐down list, select the protocol of the messages that can be forwarded.
A default filter allowing forwarded packets through the firewall is automatically created. If desired
you can use the Advanced Setting mode of the Port Forwarding wizard to further restrict packets
based on source address and source ports. In most cases this is not necessary.
4. Click Finish.
Adding Outbound Traffic Rules
To prevent a device within the LAN from communicating with a device in an external network, a rule has to be
established in the firewall to drop packets destined to the external device.
1. Click Add Rule in the Outbound Traffic section.
2. Enter a name and description. Click Next.
3. In the Destination IP field, type the IP address of the device or network packets are being 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.
5. In the Destination Port field, type the port packets are destined for. Common destination ports are
listed in the Destination Port field's attached drop down list. Type ANY if the destination port does not
matter.
6. In the Source IP field, type the IP address of the device or network that the traffic originates from. Type
ANY if the source address does not matter.
7. In the Source Mask field, type a network mask for the origin of the traffic.
Using the Router's Web Interface 22