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Port forward through 2 routers?

Last response: in Networking
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June 12, 2013 8:20:24 PM

Hey guys,
This is going to be an awkward explanation because I can't find a way to organize it well; please just try to follow along, and if you don't understand something, tell me.
I'm trying to set up a Minecraft server by port forwarding. However, I'm connected through 2 network devices.
The first I know is a router. It's the Linksys E2500, and I'm connected to it through Ethernet.
The device that the router is connected to is a bit strange. It's the gateway that Comcast provided us with, and seems to be a gateway, modem, and router all in one. Therefore, I don't know whether I'm connected to the router or the gateway. I don't know the model of it either, because Comcast gave very little information and there are no resources I can find online, even in the gateway's page. (10.0.0.1) I just know that the model is the same or similar to the one in the picture under "wireless gateways".
http://customer.comcast.com/help-and-support/internet/c...
On the gateway's control page, I am completely lost. It's not like any router I've dealt with before, as close to nothing seems to be editable. Also, the layout of the page is weird, and I can't even find a place set a static IP. I'm thinking that it's probably not the router, but as I state in the next section, I don't know where that router is.
If I am connected to the router on the gateway, I don't know the local IP address. I've tried all variations of 192.168.x.x, but only the 1.1 works, and it's the linksys router.
My problem is that port forwarding through just the router doesn't seem to work, and I have no idea how to port forward through 2 routers. What's more, the few tutorials I've seen on port forwarding through 2 routers don't cover what I should do on the awkward layout of my gateway page, if that's even where I'm supposed to be.
I can't use wireless connections either, because both devices are too far away for me to receive a signal.
So can anyone help me do this? I just need to know how to port forward through the mess of a network I'm in.
Alternatively, I thought about getting an Ethernet splitter and connecting one of the outputs to my computer and the other to the router (there are still people in my house who need the wireless on that router). How would that work? And would port forwarding be the same?
Once again, sorry for the awkward organization of all of the information.
Thanks in advance!

More about : port forward routers

June 12, 2013 8:39:02 PM

If you read the stickers it tells you the brand and model, but I suppose you really don't need to know anyway it's a dory.

10.0.0.1 if its not in bridge mode will bring up a login.

username admin
password: password

if this doe snot work someone changed it, if no one intentionally did it, 20 second son the reset with paperclip unfolded, and its will come back to defaults.

I don't understand why you have that thing running as a router then another router, that's just doing double Nat for no real reason.

That said you will want to forward the ports to the second router's IP on the Comcast dory, then have that router forward them to the specific computer IP, I suppose.
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June 12, 2013 8:46:13 PM

wacabletech said:
If you read the stickers it tells you the brand and model, but I suppose you really don't need to know anyway it's a dory.

10.0.0.1 if its not in bridge mode will bring up a login.

username admin
password: password

if this doe snot work someone changed it, if no one intentionally did it, 20 second son the reset with paperclip unfolded, and its will come back to defaults.

I don't understand why you have that thing running as a router then another router, that's just doing double Nat for no real reason.

That said you will want to forward the ports to the second router's IP on the Comcast dory, then have that router forward them to the specific computer IP, I suppose.

Apparently I'm just horrible at searching, because I see that it's a dory now. :p  However, I still don't have enough information about it to port forward.

I have logged into it with the username and password, but the problem is, the layout is confusing and a lot of functionality seems to be missing.

Also, I did not set up this network, and I have no idea how it was set up. It seems like a waste to me too.

As for forwarding the ports on the dory, could you please explain how to do that? As I said, I know nothing about the dory.
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June 12, 2013 10:43:53 PM

Call your ISP tell them you want to setup your modem in a RFC 1483 Transparent Bridging mode. This turns the router / modem product into just a modem with direct pass thru to your router. Then login to your normal router and setup port forwarding as required. In some cases you can setup this mode yourself (you'll need to set it then probably power cycle it) sometimes this is in a "hidden" set of menus that you need a special login to get into. If you have any issues doing the port forward reference http://portforward.com/english/routers/port_forwarding/... just tell if your router and what game and it will walk you thru the forwarding with pictures in most cases.
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June 14, 2013 7:18:08 AM

Good luck with Comcast. The are the nations largest internet provider and there are some really sharp people working there as well as the not so sharp. Static IP addresses have to be purchased for a fee are NOT in the same range as dynamic.

The modem is set up in bridge mode. Go to whatismyip.com and you will see your public IP address. Don't worry about them blocking ports, they usually don't.

You need to:

1) Call Comcast and tell them you need a static IP address.

2) Set your router up to use the static IP address.

3) The modem should connect to your router and all devices should be behind the router

4) Lock it down by using at least a 12 character password or longer.

5) Here is a port forwarding screenshot

http://screenshots.portforward.com/routers/Cisco/Linksy...

- your server will need a static IP address from your LAN (I know you know the difference between WAN and LAN)

- in the given screenshot lets use the first entry to set up your forwarding
* Where it says XBL1 change it to what ever you want
* Where the number 53 is change it to the port number you need to open
* Where it says both select the protocol(s)what your server needs
* Where the box has .145 change the number to the IP address for your server
* Check the enable
* Save the configuration
You have now opened up one port. Need more? Add another line.....You can do it!!! Let us know how it goes.
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