New DSL Service

[Steve Jardine]

Update: The modem uses ebtables...

On Sun, 20 Sep 2009 03:46:17 +0000 (UTC)
Steve Jardine <sjardine at acm.org> wrote:

> All,
> 
>     I just changed over my service to QWest DSL. I kinda had to - they killed off my old service. 
> 
>     I have a new Actiontec Q1000 modem that is based on the Busybox distro. It is, well interesting. I have been trying to have the box make available a single port to the outside world. Port 84. Well, that has been more trouble than it would appear. 
> 
>     First off, the LAN side of the modem defaults to 192.168.0.x. I have my internel net set to something different  - still a non-routable address space mind you. Setting up a "rule" on the modem I set a "port forward" to my internal ip number (X.X.1.2 255.255.255.0) and port 84 internal and external. It make these rules:
> 
> # iptables -t nat -L -v -n --line-numbers
> Chain PREROUTING (policy ACCEPT 5876 packets, 378K bytes)
> num   pkts bytes target     prot opt in     out     source               destination
> 1       43  5422 ACCEPT     all  --  *      *       0.0.0.0/0            224.0.0.0/3
> 2        0     0 DNAT       tcp  --  ppp0.201 *       0.0.0.0/0            0.0.0.0/0           tcp dpt:84 to:X.X.1.2
> 
> Chain POSTROUTING (policy ACCEPT 27 packets, 2616 bytes)
> num   pkts bytes target     prot opt in     out     source               destination
> 1     1804  120K MASQUERADE  all  --  *      ppp0.201  0.0.0.0/0            0.0.0.0/0
> 
> Chain OUTPUT (policy ACCEPT 66 packets, 7078 bytes)
> num   pkts bytes target     prot opt in     out     source               destination
> 
>    Of course, then this system has a screwy P-T-P route??
> 
> ppp0.201        Link encap:Point-Point Protocol
>                 inet addr:174.17.Y.Y  P-t-P:67.40.Z.Z  Mask:255.255.255.255
>                 UP POINTOPOINT RUNNING NOARP ALLMULTI MULTICAST  MTU:1492  Metric:1
> 
>   Summary: External "Internet visible IP" 174.17.Y.Y, internal visible IP #X.X.1.1.
> 
>   Anyone have experience with this kind of ADSL setup??
> 
> 
>     Steve 
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