Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!menudo.uh.edu!mtecv2!josevela
From: josevela@mtecv2.mty.itesm.mx (Jose Angel Vela Avila)
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Re: Undelivered mail
Message-ID: <3455@mtecv2.mty.itesm.mx>
Date: 11 Jun 91 21:23:36 GMT
References: <9106101940.aa12919@louie.udel.edu> <ALBERTO.91Jun11081827@yamuna.cs.umd.edu>
Organization: ITESM. Campus Monterrey
Lines: 57

alberto@cs.umd.edu (Jose Alberto Fernandez R) writes:


>I think this is a very interesting issue. Here in Maryland they have
>similar concerns. Mostly with the fact that a dial-in person would get
>complete network access as a Maryland site, which can be a security
>risk. 

>Is there any accounting or login system for SLIP access?

>Here in maryland we have modems connected to annex servers across
>campus. Do you think it is possible to login to a machine in the
>network (without using SLIP) and then activate an SLIP "circuit" from
>the account. Has somebody done something like that? 


 Yes ! Alberto, here in our Campus I've made some test with SLIP and here
is my experience :


  I try it on 2 machines :

 a) Vax 6310 from DIGITAL running Ultrix 32 (Ver 3.0)
 b) RS/6000 from IBM running AIX ( Ver : I don't know, every month it changes )

 On the Vax, you have to configure some things to get SLIP working, also
  you have to RECOMPILE your kernel with the SLIP option included.
 After that, you can call or connect to your Unix machine, then login with
  your usual login and password, then if you can login you then just type the
  command :

 slattach my_host  
 Where my_host is declared in the data base /etc/sliphosts.

 Well that was for Ultrix.

 For the RS/6000 the thing is a little more funny.
 The procedure is the same for login but not for all the bunch of work I went
  through to get it work.
 After many painfull tests, I have to made a very 'interesting' program in
 sh (shell) that after so many precious tests (slattach don't exit on logout)
 with a command like this :

  ifconfig sl0 gateway_address my_address up

 All this for every new connection.

 Of course all this after a lot of trouble with all the WELL done commands and
 programs for serial terminal control.
 

 OK, this is just a little taste of SLIP, if you need more information, just
 drop me an email. 


 Jose A. Vela Avila
josevela@mtecv2.mty.itesm.mx