Double Nat and Port Forwarding vs. UPNP

Doug M

Reputable
Nov 15, 2014
2
0
4,510
Here's what I'm trying to accomplish. I want to be able to use bittorent with either UPNP or with port forwarding. Unfortunately my ISP can not put the modem into bridge mode and limits 10 connections on the modem. The TV is provided via the modem so it must be able to hand out addresses on it's subnet. With my wireless and wired devices I go beyond this. So my modem uses an address of 192.168.200.1 and limits 10 addresses, 3 are for TVs. At one point I had changed the dedicated number of allowable connections and it messed up my tv signal when moving large amounts of data through the network, so I need to use a router to bypass. My EA6500 router is pointed to 192.168.200.10 and I can access that via web with 192.168.1.1. All of this works quite nicely as I have full control of the network...until I tried bittorrent. At first I tried just turning on UPNP on both modem and router, but that didn't work. So then I tried port forwarding. I have my pc dedicated to an address of 192.168.1.127 and it seems to get that address every time I boot. I'm running ubuntu 14.04 on that machine. I have the router to open the appropriate ports (I've done this way too many times before) and I think it's right. However, when I go to port forward on the modem, I'm not sure I'm doing it right. The modem is a Zyzel VMG3841-B10A. This is what I have in port forwarding:

WAN Interface: Ethernet_DEFAULT WAN IP 192.168.1.127 Server IP Address 192.168.200.1 Start Port (port number) End Port (port number) Protocol TCP/UDP

What am I missing....or is there an easier way of working UPNP around this? I'd prefer to go dedicated port forwarding given security risks. Thoughts?
 
Solution
so your ISP modem should forward the relavent BT ports to your second modem, which then forwards to your PC.

one last thing to check is the software firewall built into Ubuntu, that will also need to allow unsolicited packets on the relevant ports.

that will work if configured correctly.

FiL

Distinguished
Feb 4, 2002
588
0
19,010
so your ISP modem should forward the relavent BT ports to your second modem, which then forwards to your PC.

one last thing to check is the software firewall built into Ubuntu, that will also need to allow unsolicited packets on the relevant ports.

that will work if configured correctly.
 
Solution