Help configuring laptop and dialup Inet gateway

[dsr at tao.merseine.nu]

On Thu, Apr 28, 2005 at 06:07:34AM -0400, Scott Ehrlich wrote:
> I want to experiment with configuring my laptop (I plan to put Debian on
> it) with modem as a dialup Internet gateway to help bypass my cell phone
> provider's data charges and turn my home number into an ISP.  I'd also get
> a data/voice detector for the line.
> 
> OS/application-wise, what would I need to do, specifically, to get this up
> and running?

Three parts:

1. Get the modem working. Highly dependent on what kind of modem it
is. If this is a built-in modem, it's likely to be completely unusable,
because it has no controller. If you're lucky, it would be supported by
the linmodem project (www.linmodems.org). If you're very lucky, it's a
real modem.

2. Get PPP working. http://www.tldp.org/HOWTO/PPP-HOWTO/

3. Configure the box with the modem to forward packets and do
whatever firewalling you want.

-dsr-