What's causing my demand ppp to connect?

["Randy Orrison" <randy@orrison.com>]

I'm a relative newbie to Linux and Debian (though in a former life I was a
Unix sysadmin).  I've installed potato r3, upgraded to 2.2r4, and had my
pppd working fine, dialling out on demand at reasonable and predictable
times.  Now I've upgraded to woody and it's dialling out every 5-10 minutes,
then hanging up after the idle timeout.  I've looked at all the /var/log/...
files I can think of to find out why it's dialling out, but I can't find any
activity in any of the logs that would explain it trying to connect.

Without going into all the gory details of what's installed and running, is
there some log I can look at (or request) that will give me the pid of the
process that's connecting to a non-local IP address and causing ppp to dial?

Thanks!