(also works on a wide varierty of cheap adsl routers because they pretty much all use the same chipset)
a. hard reset the modem, making sure you know the login. dhcp on your pc, browse to 192.168.1.254
b. Quick start | username and password, PPPoA VCMUX, VPI=0, VCI=100, tick automatically reconnect, save config and restart, confirm connects under NAT.
c. Configuration | Advanced | Misc Configuration | Half bridge | Enabled
d. Configuration | WAN | pvc0 submit| and return the encapsulation to pppoa VC-MUX, Half bridge alters this wrongly to ppoe llc
b0. Save settings and restart
c. Configuration | Advanced | Misc Configuration | HTTP Server Port | 81
b0. Save settings and restart
And there you have it, if you are lucky, and the stars line up, your WAN ip address on your box, check your firewall. Whether it will survive a reboot depends. Now you can get back into the modem at 192.168.1.254:81
While the above worked for me in 2008 using Xnet, attempts to reproduce it that same year using more or less identical hardware, but another ISP,Planet, were eratic at best. YMMV.
This is an alternative method if half bridge doesnt work well. The modem just maps all incoming traffic to the static ip address of your linux router.
a. Configuration | LAN | DHCP server | off
b. Configuration | Advanced | NAT | Enabled
c. Configuration | Advanced | NAT | mode | NAT (sometimes static NAT)
d. Configuration | Advanced | NAT | Session name config
d2. Enter: {yourname}, interface: PPPoPvc0, add, submit
d. Configuration | Advanced | NAT | Session name config | go back to nat config
e. Enter: session: {yourname}, IP= 192.168.1.1}, add, submit
f. Configuration | Advanced | Misc config | DMZ | Enabled
f2. Configuration | Advanced | Misc config | Host IP | 192.168.1.1
g. Save settings and reboot
h. setup your linux router with a static IP on the same subnet as the modem.
Set your linux router to have a stsic WAN address 192.168.1.1. The will forward all incoming ports to the linux router, and basically map the dynamic WAN ISP to your linux routers static IP, directly and exclusively. The advantage of this is if your firewall ruleset needs to know its WAN IP then its easier with a static IP on the routers WAN.
If you have anyway to compare the performance of these two methods let us know, edit the page!
http://kb.netcomm.com.au/kb/default.asp?id=2761&Lang=1 (howto bridge 1320)
http://www.dynalink.co.nz/cms/index.php?page=adsl2-modem-router-rta1320-2
(firmware to use)
http://forums.whirlpool.net.au/forum-replies-archive.cfm/595905.html (setting up PPTP)
One page links to Billion7100:
