(also works on a wide varierty of cheap adsl routers because they pretty much all use the same chipset)
a. Quick start | username and password, PPPoA VCMUX, VPI=0, VCI=100, dhcp server on, save config and reboot, confirm connects under NAT.
b. Configuration | Advanced | Misc Configuration | Half bridge | Enabled
c. Configuration | Advanced | Misc Configuration | HTTP Server Port | 81
d. Go back to Configuration | WAN | pvc0 submit| and return the encapsulation to pppoa VC-MUX, Half bridge alters this wrongly to ppoe llc
e. reboot router,
f. use dhcp client downstream, and there you have it, your WAN ip address on your box, check your firewall.
These and many similar modems support `DMZ`, but all this does is NAT to a static LAN address, sans firewall. Turn off NAT and DMZ doesnt work. This might get around some folks `port forwarding`/virtual server issues, but youre still stuck with a weak NAT implementation.
You could however try this, it worked here. It is said that 1:1 NAT removes a NAT step, but theres still more routing going on than necessary.
a. Configuration | LAN | DHCP server | off
a2. Check device IP address and netmask {same subnet as your linux router}
b. Configuration | Advanced | NAT | Enabled
c. Configuration | Advanced | NAT | mode | NAT (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}, users IP= {static IP of your linux router}, add, submit
f. Configuration | Advanced | Misc config | DMZ | Enabled
f2. Under DMZ Host IP, enter: {static IP of you linux router}
g. Save settings and reboot
h. setup your linux router with a static IP on the same subnet as the modem.
This 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 (which it will if your iptables is tight), then its much 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:
