On Wed, May 6, 2009 at 12:32 PM, Andrew Watts <systemstalker@xxxxxxxxx> wrote:
Hi,
I have a cellular modem that configures a ppp interface for IP
communication. I would like to bridge the ppp and Ethernet interface
together. brctl does not allow for bridging between ppp and ethernet
interface. I expect this mainly due to the fact that I am trying to
bridge 2 different layer 2 protocols, PPP and Ethernet. I have seen
mention that many ADSL routers support "half bridge mode" or "ZIPB"
(Zero IP Bridge), this is also called IP-Passthrough. Basically I
need a device that works like a modem such that the Public IP address
that the modem receives from the ISP is passed trough and assigned to
a node (router or SINGLE host). One of the devices I want to connect
doesn't play well with NAT nor does it have the ability to support
PPPoE/USB Modems. I am also trying to make a secondary modem as a
failover connection that uses a 3G modem. A company by the name of
cradlepoint sells a device that does this called the CBA250. I have a
Linksys NSLU2 that would be PERFECT for this, I just don't know how to
do it. If possible I would also like to be able to firewall a little
too.
http://www.evdoinfo.com/content/view/2601/64/
I want to do this to, just with Linux. What code should I look at to
do this or is there a way to configure the system to do what I want.
In a perfect world ppp and ethernet would bridge and play nice but its
not. Any advice would be greatly appreciated. I am more than willing
to write code to get this to work but I'm pretty new to this and have
no idea where to even start.
Thanks
Andrew
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