Opening The Firewall For A Selected Pc (Exposed Host) - SAGEMCOM SE681 WiMAX User Manual

i
This function is not available in Bridge operating mode, see "Configuring
Internet access" on page 32.

Opening the firewall for a selected PC (Exposed Host)

You can set up a client in your local network to be a so-called "exposed host". Your
device will then forward all incoming requests from the Internet to this client, with the
exception of requests to the port numbers already defined via port forwarding. 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.
Open the Advanced Settings tab and on the Internet menu select Exposed Host.

Define the list of PCs you want to set up as exposed hosts.

Activate a PC which you want to function as the current exposed host. Only one PC

at a time can be selected.
The IP addresses of the PCs you want to set up as exposed hosts must
remain unchanged. If the IP addresses of the PCs are assigned via the
i
DHCP server of the SE681 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 36.
i
This function is not available in Bridge operating mode, see "Configuring
Internet access" on page 32.
Port Forwarding
35