Opening The Firewall For Selected Pcs (Exposed Host) - Siemens GIGASET SX762 WLAN DSL Manual

Configuring Advanced Settings
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Enter the IP address of the PC that provides the service in the Local IP address field.
Example: The Web server has been configured to react to requests on port 8080.
However, the requests from web sites enter the Web server via port 80 (standard
value). If you add the PC to the forwarding table and define port 80 as the public
port and port 8080 as an internal port, all requests from the Internet are diverted to
the service with the port number 80 on the Web server of the PC you have defined
with port 8080.
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Comment: Enter a description that makes it easy to identify different entries.
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Activate Enabled by ticking the check box.
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Click the Add button to add a new entry.
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Click the Delete button to delete an entry.
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Click OK to apply the settings.

Opening the firewall for selected PCs (Exposed Host)

You can set up a client in your local network to be a so-called "exposed host" (DMZ). Your
device will then forward all incoming data traffic from the Internet to this client. You can
then, for example, operate your own Web server on one of the clients in your local net-
work and make it accessible to Internet users.
As the exposed host, the local client is directly visible to the Internet and therefore par-
ticularly vulnerable to attacks (e.g. hacker attacks). Only activate this function if it is
absolutely necessary (e.g. to operate a Web server) and other functions (e.g. port for-
warding) are not adequate. In this case you should take appropriate measures for the
clients concerned.
Note:
Only one PC per public IP address can be set up as an Exposed Host (see also the sec-
tion entitled Port Forwarding on page 59).
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To set up a PC as an exposed host, select Exposed Host from the Advanced Settings
– Internet – Address Translation (NAT) menu.
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Enter the Local IP address of the PC that is to be enabled as an Exposed Host.
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Enter a name for the PC in the Comment field.
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