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Advanced Settings
Port Forwarding
The Cisco BWX360 WiMAX Outdoor Modem comes with the NAT (Network Address
Translation) function, which is always activated in Router operating mode. With
address mapping, multiple users in the local network can access the Internet via the
public IP address. All the local IP addresses are assigned to the router's public IP
address by default. All IP addresses of PCs in the local network are converted to the
router's public IP address when accessing the Internet.
Most Internet applications can be executed behind the NAT firewall without any prob-
lems. However, some applications - such as Internet games - require users in the Inter-
net to send requests to users in the local network so that the players can communicate
with each other. Sometimes these applications also require several ports to communi-
cate through. Such applications do not work if NAT is active.
Using port forwarding (the forwarding of requests to particular ports) the router is forced
to send requests from the Internet for a certain service, for example a game, to the
appropriate port(s) on the PC on which the game is running. If you configure Port For-
warding, the Cisco BWX360 WiMAX Outdoor Modem outwardly assumes the role of
the server. It receives requests from remote users under its public IP address and auto-
matically redirects them to local PCs. The private IP addresses of the servers on the
local network remain protected.
Internet services are addressed via defined port numbers. The Cisco BWX360 WiMAX
Outdoor Modem needs a mapping table of the port numbers to redirect the service
requests to the servers that actually provide the service. Port Forwarding has to be con-
figured for this purpose.
Open the Advanced Settings tab and on the Internet menu select Port Forward-
ing.
Define the list of services for which you want requests from the Internet to be for-
warded.
Important services are already included in the Predefined applications selection field.
The list can hold up to 20 entries.
The IP addresses of the PCs for which you set up port forwarding must
remain unchanged. If the IP addresses of the PCs are assigned via the
DHCP server of the Cisco BWX360 WiMAX Outdoor Modem, you must
select the option Never expires as the Lease time when configuring the
DHCP server or assign static IP addresses to the PCs, see "Configuring
the DHCP server" on page 30.
This function is not available in Bridge operating mode, see "Configuring
Internet access" on page 26.
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