NAT not working???????????

So, UPNP won't work with a static ip address.... you will need to have a automatic ip for upnp to work.

as for portfowarding and dmz, you need to choose one or the other, best would be to DMZ to your mac address.

Hi,

The SB6121 is just a bog standard cable modem m it has no UPnP settings or DMZ www.motorola.com/.../577212-001-a.pdf

Are you connected to a router that connects to the modem? I don't understand how you can have NAT issues if you are connected directly to that model of modem as its just a standard modem

so i found out that i connect to a D-Link router. The only problem. I dont know what router. Its a pain to look at because its in my garage like 10 feet high. I also dont get how using a manual (or static) IP Addess doesn't support UPnP. I also read in another forum, something about double NAT (not double Xbox) where the router allows the NAT change but the modem doesn't. i have tried both DMZ and Port Forwarding seperatly, but nothing really changed. If i plug a cable into the wall, is it going to my modem or to my router? There both high in my garage, so I can't really tell. I can enable UPnP on my D-Link but not my motorola. Also my internet provider is ComCast but my modem is motorola, so if I want a setting on the modem to be changed (know as bridging mode" or "pass through mode) do I talk to Motorola or Comcast?

"If i plug a cable into the wall, is it going to my modem or to my router? There both high in my garage, so I can't really tell."

We can't tell you that I'm afraid it is your own cabling

You won't be double NAT'ing it will be a config issue on the Dlink, please post up the model of Dlink

so the router model is dir-655 and Firmware Version: 1.21

Hardware Version: A3

so if i port forward and enable uPnP and use a autimatic ip address, i stil have a strict nat. It says its open, but it doesnt connect  to other people because of NAT. I still dont get this

Hey there set!

You should do a firmware update on your router. Visit: www.dlink.com/.../dir-655-wireless-n-gigabit-router And download the latest update. Follow the instructions on how to update your router's firmware correctly.

As stated from the previous poster's, do not use UPnP (automatically tell the router to open and close listening ports) and Port Forwarding (manually tell the router to open and close listening ports) at the same time.

Solution 1
UPnP=Enabled
Port Forwarding=Disabled

Solution 2
Port Forwarding=Enabled
UPnP=Disabled

Post back and let us know how it goes.

so my firmware is the latest.my network was already uPnP enabled and port forwarding disabled. I tried port forwarding enabled and uPnP disabled. nothin changed. i still need help.

When you access your Dlink router status page what does the WAN/Internet ip address start with? 192 or 10 or 172

Please post up the first 2 or three digits only

192

Ok so that is the reason for your problem you are indeed "double NAT'ing" if your WAN / Internet ip address starts with 192. Whatever is connected to the Dlink (and then connected to the Internet) is also a router and the source of your problem. You need to find out what device is connected into the WAN port of the Dlink router

something weird happened today. so under my wan settings on my router, my IP address was 172 not 192. Dumb me. But this is why i thought it was 192. Under the WAN settings, my IP is 172, but everything connecting to the router like my Xbox or laptop is 192? this is confusing. in the end my router is 172. but stuff connecting is 192. i do have a repeater in the house setup, but i cannot access its settings. I don't really use the repeater.

What are the next two digits after 172.?

e.g 172.16 or 172.31

Don't post them all just the first two digits as you still could be double NAT'ing

What you are seeing is normal your LAN ip address (192) should be different from your WAN ip address

What is this repeater? It sounds like the source of the problem