Is it possible to do port forwarding if my router doesn't support it? (I can't upgrade the firmware because it's not my router, and I can't switch routers because the router contains the modem from the ISP). I was thinking that maybe it'd be possible to use NAT in order to simulate port forwarding. Is it possible to send certain requests to the router from inside the LAN so that it forwards signals from outside the LAN (on a specific port) back to that computer using NAT? Or maybe it'd be possible from outside the LAN, to send a signal to the router that'd cause it to broadcast a message to the entire LAN on an obscure port. Then only one computer would be listening on that port. Could any of these ideas work? Are there other options? Thanks

Quote: Original post by daniel_i_l
Is it possible to do port forwarding if my router doesn't support it?

No.

Quote: (I can't upgrade the firmware because it's not my router, and I can't switch routers because the router contains the modem from the ISP).

Don't be so sure about that; router/modem combos I've seen allow you to set the modem to bridge mode, and use an external router, or no router at all.

Quote: Are there other options?

Are you sure your modem doesn't support port forwarding? What model is it?

Quote: Original post by Sneftel

Quote: (I can't upgrade the firmware because it's not my router, and I can't switch routers because the router contains the modem from the ISP).

Don't be so sure about that; router/modem combos I've seen allow you to set the modem to bridge mode, and use an external router, or no router at all.

How can you do that? The router's interface is very minimal. It doesn't let you configure anything. (it only displays log information)

Quote: Are there other options?

Quote: Are you sure your modem doesn't support port forwarding? What model is it?

D-Link DSL-2760U
Thanks for your time.
[EDIT: I wrote the wrong model number]

[Edited by - daniel_i_l on December 17, 2009 11:39:30 AM]

Hm.. it sounds like your ISP decided to limit your access to the firmware. That could be to make things more user-friendly, or it could be to keep you from doing the sort of port forwarding you want to do. You might contact them and ask if there's a way around the interface. I suppose you could also try UPnP, though it would be very strange if that were enabled by default. Lastly, you could buy and use your own DSL modem.