PPPoE on Debian

For linux based routers weve been playing around with the Draytek range of modem/routers, which are starting to become available here.

 

Heres a breif howto to set up PPPoE on a gateway box.

 

Before you upset the existing net connection get the packages:

 

 

The next step took a bit of fiddle when i did it, so id recomend doing this in two steps.

 

Step 1

0. Set you client pc NIC up on dhcp.

1. Log into the draytek vigor (from factory default the http auth user and password are both blank) and the ip is 192.168.1.1.

2. Change the modems LAN IP to 192.168.1.254, turn off dhcp (under LAN), and under management change the http access port to 81.

3. The modem will reboot

3a. Reaccess the modem on 192.168.1.254:81 (ie change your client pc to something on that subnet, static ip, temporarily)

4. Under internet access, select pppoa/pppoe, then enter   the usual 0 / 100 / vcmux, your dsl login and click stay connected.

5. On the status page, click Dial PPP. If the status line goes green and gives you an WAN IP your connected.

5a. Change your client pc back to 192.168.0.0 subnet, and ssh into the gateway.

6. On your gateway box edit /etc/network/interfaces so that the WAN interface has a static IP 192.168.1.1, and a gateway of 192.168.1.254, ifdown

7. Restart eth1 using ifdown eth1, ifup eth1

 

You should now have a double NAT thing going ok. Test it for a bit and ensure you can still get back into the modem on 192.168.1.54:81

 

Step 2

Ok now this is stable, (my one seemed to get confused if i changed too many things at once), lets put the modem into pppoe pass through mode.

 

1. Log into the modem on 192.168.1.254:81

2. Under Internet access, pppoa-pppoe, PPPoE Pass-through: tick for wired lan.

3. On the gw run pppoeconf. It will detect the modem and configure it with all the defaults, and your dsl login.

4. Poff, then reedit the interfaces file to remove the gw previosuly specified for eth1. Restart eth1, then pon.

 

You should now have a ppp0 interface listed under ifconfig, with an IP address. Typing route should yeild wthout pause alisting like:

 

www.webspaces.net.nz/page.php?view=pppoe-on-debian 2011-08-02