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Bit OT as the subject line says, but might be interesting...

Back story:
Just got myself a nice little Sony Clie SJ22 + bluetooth card. And of course
I want to browse the web with it. After a bit of poking about I manage to
get the Bluez linux system running and make a working PPP link between the
Clie and my main box. The packets flow and I can browse the web, great.

The problem:
I use a dial up internet connection, so that too has a PPP interface,
traditionally ppp0. I also have a simple firewall script which expects the
dial up connection to be on ppp0. But wait! If I connect the Clie to the PC
whilst the dial up is down, it gets assigned ppp0, problem.

So what do I do? Change the firewall to block by IP addy? Isn't that less
secure? I've looked to see if I can force assignment of i/f name through
pppd but haven't seen anything, might be looking in the wrong places.

Any ideas?

Blumf

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/dev/rob0 wrote:

> In article <bg1qo9$tgs$1@newsg1.svr.pol.co.uk>, Blumf wrote:
>> I use a dial up internet connection, so that too has a PPP interface,
>> traditionally ppp0. I also have a simple firewall script which expects
>> the dial up connection to be on ppp0. But wait! If I connect the Clie to
>> the PC whilst the dial up is down, it gets assigned ppp0, problem.
>>
>> So what do I do? Change the firewall to block by IP addy? Isn't that less
>
> No, don't do that. Your Clie PPP interface always has the same P-t-P
> peer, right?
> PEER=clie.ppp.peer.IP
> if [ "`ifconfig ppp0 | grep P-t-P:$PEER`" ] ; then
> EXTIF=ppp1
> else
> EXTIF=ppp0
> fi
> Pretty simple. HTH.

Thats okay I guess, it requires the firewall script to be run each time a
PPP link goes up or down (/etc/ppp/ip-[up|down] I suppose) That 'feels' a
bit clunky to me. I'll give it a try though.

Thanks

Scott