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Configuring the Advanced Settings
Gigaset SE366 WLAN / englisch / A31008-M1063-R101-4x-7619 / configure_router.fm / 13.11.2008
Schablone 2004_12_27
Using port forwarding (the forwarding of requests to specific ports) you make the router
forward requests from the Internet for a certain service, e.g a game, to the appropriate
port or ports on the PC on which the game is running.
Port triggering is a specific variant of port forwarding. Unlike port forwarding, in this
case the Gigaset SE366 WLAN forwards data from the set port block to the PC which has
previously sent data to the Internet via a certain port (trigger port). This means that per-
mission for data transfer is not tied to one specific PC in your network, but only to the
port numbers of the required Internet service.
Where configuration is concerned, this means:
u You have to define a so-called trigger port for the application and also the protocol
(TCP or UDP) that this port uses. To this trigger port you then assign the public ports
that have to be opened for the application.
u The router checks all outgoing data for port number and protocol. If it recognises a
match of port and protocol to a defined trigger port, then it will open the assigned
public ports and notes the IP address of the PC that sent the data. If data comes back
from the Internet via one of these public ports, it allows the data through and routes
it to the right PC. A trigger event always comes from a PC within the local network.
If a trigger port is addressed from outside, it is simply ignored by the router.
When the Gigaset SE366 WLAN is delivered, the NAT function (Network Address Trans-
lation) is activated, i.e. all IP addresses of PCs in the local network are mapped to the
router's public IP address when accessing the Internet.
You can use the NAT settings for the Gigaset SE366 WLAN to
u set up port triggering for special applications (see page 58),
u set up the Gigaset SE366 WLAN as a virtual server by configuring Port Forwarding
(see page 59),
u open the firewall for selected PCs (see page 60).
Note:
u An application that is configured for port triggering can only be run by one user in
the local network at a time.
u As long as the public ports are open, they can be used by unauthorised persons to
gain access to a PC in the local network.
Note:
For the functions described below you must make sure that the IP addresses of the PCs
do not change. If the IP addresses of the PCs are assigned via the DHCP server of the
Gigaset SE366 WLAN, you must select the option Never expires for the settings on
the Local Network screen for Lease time (see page 64) or assign static IP addresses
for the PCs.