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- Path: sparky!uunet!casey!kevinc
- From: kevinc@ups.com (Kevin C. Castner)
- Subject: Auditing Modem Usage
- Message-ID: <1992Nov10.215906.17338@ups.com>
- Keywords: modem external security
- Organization: UPS Research & Development
- Date: Tue, 10 Nov 1992 21:59:06 GMT
- Lines: 48
-
- I'm running a network of Sun Sparc's with 3 of the machines having external
- modems attached to their tty ports.
- My managers have decided that it would be a good idea to see who is calling
- where, when.
-
- Up till now, my users have been using standard system tools or common
- utilities such as cu, tip, kermit. I set up a little shell script that
- asked the user where they were dialing, when, and time. Of course, the
- phone bill doesn't match the voluntary log, so I am force to use a more
- drastic (or draconian) method. (So much for my faith in my user community).
-
- The problem is that I don't want to take away the tools that the users
- currently using. My managers are not interested in restricting access,
- but would like the ability to restrict access to the modems by user, or
- prevent any user from dialing certain numbers at a future time (if the
- situation warrants).
-
- Buying a TERM type product, would give me these abilities, but would force
- my users to learn and adopt a new product. Also given that this is an
- R&D center, alot of my users could easily write a new cu or tip, get to the
- tty and force the dial from the intelligent (hayes) modem. Restricting
- permissions on the tty and writing a wrapper program only works for cu
- and tip, but my kermit users can still get to the intelligence of the
- modem and give the command there. I know if they did that, I would still
- know who did it b/c I would have the log and the telephone bills, but my
- managers are awfully upset about the lack of support for my little
- program and want something ironclad.
-
- The idea I came up with was to replace the drivers with one that would
- also recognize the Hayes dial and disconnect strings, and log those
- events. I've never written a device driver, so I don't know if this
- is possible, or what technical problem I could/would run into.o
-
- Now I'm sure I'm not the first to run into this problem so I'd like to
- hear some solutions that people have used. All ideas are welcome.
- If I don't get something my users are going to lose their tools. I don't
- want to see that happen.
-
- I thank you for all your help. If those who respond would do so by
- E-Mail, I will post a summary in a week or two.
-
-
- Thanks
- --
- ======================================================================
-
- Kevin C. Castner kevinc@ups.com
- Unix Administrator United Parcel Service
-