Wireless Cable Modem Gateway CGD24G User Manual
•Protocol. Select the protocol for the ports:
–TCP. Select TCP only.
–UDP. Select UDP only.
–Both. Select both TCP and UDP.
•Local IP Address. Complete the local IP address for the computer that is using the service.
Note: To reset the selection in the Service field and to clear all the fields in the Add Custom Rules table, click Reset.
4.Perform one of the following actions:
•Click Add to save your settings. The Active Forwarding Rules table now displays the list of ports that are currently forwarded.
•To delete a service, select the radio button in the Active Forwarding Rules table for the service that you want to delete, and then click Delete.
Considerations for Port Forwarding
•If the IP address of the local server PC is assigned by DHCP, it may change when the PC is rebooted. To avoid this, you can assign a static IP address to your server outside the range that is assigned by DHCP, but in the same subnet as the rest of your LAN. By default, the IP addresses in the range of 192.168.0.2 through 192.168.0.9 are reserved for this purpose.
•Local PCs must access the local server using the PCs’ local LAN address (192.168.0.XXX, by default). Attempts by local PCs to access the server using the external WAN IP address will fail.
Remember that allowing inbound services opens holes in your firewall. Only enable those ports that are necessary for your network.
Configuring Port Blocking
You can use port blocking to block outbound traffic on specific ports.
Note: Any outbound traffic that is not blocked by rules that you have created is allowed by the default rule.
Content Filtering and Firewall Rules |
