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Advanced Settings
SE680 WiMAX / engbt / SE680_FUG_EN-7 / Advanced_configuration.fm / 13.5.11
Schablo
ne 201
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Port Forwarding
The SE680 WiMAX 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 SE680 WiMAX outwardly assumes the role of the server. It receives
requests from remote users under its public IP address and automatically 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 SE680 WiMAX 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 configured 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 16 entries.
i
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 SE680 WiMAX, 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 29.
i
This function is not available in
Bridge
operating mode, see "Configuring
Содержание SE680 WiMAX
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