Port Filtering; Forwarding - D-Link DCM-604 Series User Manual

DCM-604 Series EMTA Embedded Multimedia Terminal Adaptor
User's Manual
To enable MAC filtering feature of DCM-604, enter the MAC address of the LAN device
and click Apply button.

5.4.4 Port Filtering

The Port Filtering page allows you to enter ranges of destination ports (applications) that
you don't want your LAN PCs to send packets to. Any packets your LAN PCs send to
these destination ports will be blocked. For example, you could block access to worldwide
web browsing (HTTP port 80) but still allow email service (SMTP port 25 and POP3 port
110).
To enable port filtering, enter the Start port and End port for each range. Then select its
protocol form the drop-down list and check the Enable box, and click Apply button. To
block only one port, set both Start and End ports the same.

5.4.5 Forwarding

For communications between LAN and WAN, the DCM-604 normally only allows you to
originate an IP connection with a PC on the WAN; it will ignore attempts of the WAN PC to
originate a connection onto your PC. This protects you from malicious attacks from
outsiders. However, sometimes you may wish for anyone outside to be able to originate a
connection to a particular PC on your LAN if the destination port (application) matches one
you specify.
The Forwarding page allows you to specify up to 10 rules.
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