Great Circle Associates Firewalls
(January 1995)
 

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Subject: Re: PC using external service
From: tkevans @ fallst . es . dupont . com
Date: Thu, 5 Jan 1995 20:18:54 -0500 (EST)
To: jak @ pot . hole . fi (Jaakko Manninen)
Cc: firewalls @ GreatCircle . COM
In-reply-to: <199501052217 . AAA08358 @ pot . hole . fi> from "Jaakko Manninen" at Jan 6, 95 00:17:05 am
Phone: (302) 234-9151; (302) 695-9353
Reply-to: tkevans @ eplrx7 . es . duPont . com

Sez Jaakko Manninen (for which I'm grateful):
>
>
>	Has anyone looked into the possibility of a user on a network under
>      a Firewall running a SLIP/etc connection?  Example.
>      
>        You have a closed 1200+ PC-machine LAN, connected to the Net thru
>      a BSDI+Firewall.  One PC-end user in his days of wisdom decides to
>      purchase a SLIP-connection to a local INet provider.  He enables "IP
>      Routing" from his Windows for Workgroups, and someone on the net "sees"
>      or hears about this, and decides to route himself into the "firewalled"
>      network thru this machine... Boom.
>      
>        I couldn't think of an easy way to disable this possibility, other
>      than telling the end user not to do this.  Any hints/ideas?
>            
I've just been reading about a package called "The Internet Adaptor," which
purports to set up a "pseudo-slip" link over an ordinary dialup link.
What's to keep the PC user from dialing in and routing the "pseudo-SLIP"
connection out to another network his PC is connected to?
-- 
Tim Evans                     |    E.I. du Pont de Nemours & Co.
tkevans @
 eplrx7 .
 es .
 dupont .
 com  |    Experimental Station
(302) 695-9353/7395           |    P.O. Box 80357
EVANSTK AT A1 AT ESVAX        |    Wilmington, Delaware 19880-0357


References:
Indexed By Date Previous: Re: spoofing TCP/SYN packets?
From: Darren Reed <avalon @ coombs . anu . edu . au>
Next: Re: bsdi and secureID (access?)
From: Rob Liebschutz <rob @ rjl . com>
Indexed By Thread Previous: Re: PC using external service
From: Steve Moores <steve @ ccgc . tc . gc . ca>
Next: Re: PC using external service
From: Don Krapf <dkrapf @ access . digex . net>

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