Sign in with
Sign up | Sign in
Your question
Solved

Port Forwarding with Xfinity Modem

Tags:
  • Routers
  • Modem
  • Ethernet Card
  • Port Forwarding
Last response: in Wireless Networking
Share
September 17, 2014 3:15:43 PM

Alright so I have a router up in my room that I am connected to ethernet to because I can only use ethernet at the moment. I have an xfinity modem with wifi capabilities that has a router connected to it via ethernet then my router being used as a wireless repeater. Port forwarding via the router I'm on has no effect. So I figured that I needed to port forward on the xfinity modem. I don't know what IP to put though. I can't put the regular 192.168.1.xxx IP because I get a "different subnet with dut lan ip" error. The xfinity modem seems to have a 10.0.0.x setup. Any help?

More about : port forwarding xfinity modem

September 17, 2014 3:28:12 PM

Ignore me... I dident read your post....

Any reason you are not plugged direct into the comcast modem?

Hooking router to router can cause some problems.

It would be better if you got a switch for this. That way the router will still assign you a 10.x.x.x IP address.



You can try to login to your router (the 2nd one) and see what IP it has. It should be getting a 10.x.x.x IP address from the Comcast modem. You can use that IP to forward inside the comcast settings.
m
0
l
September 17, 2014 3:34:08 PM

inerax said:
Ignore me... I dident read your post....

Any reason you are not plugged direct into the comcast modem?

Hooking router to router can cause some problems.

It would be better if you got a switch for this. That way the router will still assign you a 10.x.x.x IP address.



You can try to login to your router (the 2nd one) and see what IP it has. It should be getting a 10.x.x.x IP address from the Comcast modem. You can use that IP to forward inside the comcast settings.


Wifi is not an option. I must use this method so that I can achieve some form of wired connection with a device that requires no coax cable. Cable in my room is messed up and no wifi card in my PC so I can only do wifi. Everything was fine and worked perfectly until the new modem came into the picture.

m
0
l
Related resources
September 17, 2014 3:37:01 PM

But you are running a 2nd router that is not the comcast router?

Why can you not plug ethernet direct into the Comcast modem?

I'm wondering why a 2nd router is in the mix.

The Comcast modem has 4 ports in the back right?
m
0
l
September 17, 2014 4:13:25 PM

inerax said:
But you are running a 2nd router that is not the comcast router?

Why can you not plug ethernet direct into the Comcast modem?

I'm wondering why a 2nd router is in the mix.

The Comcast modem has 4 ports in the back right?


My computer is setup too far away from the comcast modem. I have a 3 story house with the modem and primary router on the bottom floor with me and the repeater router on the 3rd floor. I tried to setup the stuff in my room, but like I said the cable chord is messed up. So my setup is 1 router connected to modem via ethernet and one in my room that serves as a repeater. The repeater being necessary as I have no wifi capabilities. Both routers are netgear.

m
0
l

Best solution

September 17, 2014 4:15:34 PM

Ahhh now i got it... I thought you were hard wiring the router to the modem. Guess I cannot read today... or understand.

Login to the router that is acting as a repeater. On the info page you will find a 10.x.x.x IP address. This is the IP address being assigned by the Comcast modem.

You can port forward that IP inside the Comcast modem.
Share
!