GPRS\UMTS connection on demand

[zeromega]

Hi.
I'd like to set up my router to get a ppp connection on demand (when a client try to browse the web, for instance).
I have an Asus WL-500g Premium V1 with Koppel firmware (version 1.9.2.7-10-USB-1.71) and an Huawei E220.
The problem are:

I don't know how to edit a file and to let that the modified version is persistent : I tryed with
flashfs save && flashfs commit && flashfs enable && reboot but unsuccessfully
I don't know exactly which files I have to edit: I think it's /tmp/ppp/gprs/gprs, but I'm not sure

When I'll find the file and the way to save it, I think it would be enough to add

demand
idle 600
to get a connection on demand and an auto-disconnect if the line is idle.

Every suggestion is wellcome.
Thanks.

[tdani]

hi, have you done to put inside the firmware with such a mac? i have the same things but i can't put inside. could you explain me how to do? an how to for dummies?
it is important

thanks

can i put also a huawei e180?

[zeromega]

Hi.
i published an howto on my blog (http://zeromega.altervista.org/blog/2009/09/router-asus-wl-500g-premium-connessione-on-demand-con-modem-3g/), but it's in Italian.
Let me know if you need help.

[tdani]

posso avere la tua mail per contattarti? ti mando la mia tronodaniele(chiocciola)gmail.com

[zeromega]

zeromega(chiocciola)libero.it