I want to know if i can use my netgear wndr 3300 wireless router in conjunction with the telstra 2 wire gateway

Yes, you can definately configure your WNDR3300 to work with Telestra gateway modem. Perform the below steps to reconfigure your WNDR3300 with your Telestra gateway:


CONNECTIONS:

1. Connect a Ethernet cable from the modem to the WAN port of the router (isolated port).
2. Connect the computer to the router using any one of the 4 available ports. Please make sure that there is no direct connection between the modem and the computer (either using Ethernet cable or USB cable).
3. Power off the modem and the router after making the connections.
4. Power on the modem and wait for the lights, then power on the router.

RECONFIGURE:

1. Open a web browser (Internet Explorer, Mozilla Firefox or Safari).
2. Access the router, usually with http://192.168.1.1 or http://www.routerlogin.com.
3. Login to the router with the Username as "admin" and Password as "password" (please note that the Username and Password are case sensitive).
4. Click on 'Basic settings' from the left menu and select 'Use Computers MAC Address' from 'router MAC Address' section.
5. Click Apply.
6. Once it updates the settings then power off the modem and the router. Power on the modem and wait for the lights, then power on the router.

Hope this allows you to resolve the issue.

Regards

Anand