Re: [PLUG] ppp question

["William H. Magill" <magill@isc.upenn.edu>]

   >   Is there a way to set up a dialup Linux box so you can call it from a remote
   >   location, have it recognize the call somehow (by a login or whatever),
   >   disconnect, and have that Linux box call you back to establish a ppp
   >   session?
   >

   Theoretically, you can stick any modem on the Linux box's serial port, dial
   into it, and have that session launch something, say a ping, that will
   cause the enternet interface to "come up" which will cause the ISDN modem
   to dial-out.

   Of course, if your "linux router" really isn't a general purpose box, then
   you won't likely be able to do such a thing as the box will prevent such
   activities. Special purpose boxes tend to have all of the un-used features
   "turned off."

I forgot to mention -- naturally, you need to ping something that the
router knows is on the other side of the ISDN connection, not on its side.
That should cause the router to establish the ISDN connection and initiate
the PPP sequence.

You could also "lash up" the ISDN link if you know you are going to be
testing for a period of time. But depending upon many things, that might be
an expensive or inexpensive solution. (Cost of call establishment vs time
charges, basically.)


-- 
                        www.tru64unix.compaq.com
                              www.tru64.org
                             comp.unix.tru64
                        
T.T.F.N.
William H. Magill                          Senior Systems Administrator
Information Services and Computing (ISC)   University of Pennsylvania
Internet: magill@isc.upenn.edu             magill@acm.org
http://www.isc-net.upenn.edu/~magill/


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