Port Forwarding internal IP to one specific external public source IP

Our current router DDWRT has a section for "source" IP in the Port Forwarding tab. I don't see it with the Comcast cga4131com, which means if I put an internal computer there with port 3389, everybody can try to ping/connect to it. I have tried to look up NAT and the firewall section, but nothing clear. Hours of looking at internet do not have have a solution, other than connecting a different router to the Comcast device.

So, how do I configure the router to allow a specific external public remote IP to connect to an internal computer with a static IP and specific port?

So 71.x.x.x ---> 192.168.1.10:3389.

Thank you.

Responses

Comcast_Alfonso

Official Employee

•

19 Messages

3 years ago

Hey there @user_ec313f

thank you for taking the time to reach out to us on our Business forums. Please send us a direct message with your full name, business name, full address, and phone number. By clicking the "direct messaging" icon in the upper right page of our forum page. Once you click on that, input our shared handle (Comcast Business) to send us a private message.

• Click "Sign In" if necessary

• Click the "Direct Message" icon in the top right corner

• Click the "New message" (pencil and paper) icon

• The "To:" line prompts you to "Type the name of a person". Instead, type "Comcast Business" there

• - As you are typing a drop-down list appears. Select "Comcast Business" from that list

• - An "Comcast Business" graphic replaces the "To:" line

• Type your message in the text area near the bottom of the window

• Press Enter to send it

This will give us a chance to review your full setup and any ways we can potetntially resolve this. We then would be happy to re-post any solutions onto the public forum.

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