Great Circle Associates Firewalls
(December 1996)
 

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Subject: Telnet and AGS + socks/cisco Win95 + MS Netmeeting
From: "Marriage, Michael" <MIKEM @ xpo . ccn . ac . uk>
Date: Thu, 05 Dec 96 11:06:00 PST
To: "'firewalls @ greatcircle . com'" <firewalls @ greatcircle . com>
Cc: "Bock-Brown, Jeff" <JEFF @ xpo . ccn . ac . uk>

I have a number of questions I have bundeled together:

 How to program AGS+ for telnet only
 Socks and non socks Telent access
 Microsoft Netmeeting and security

I have a requirement to let Telnet access out of our network in the short   
term I may have to reprogram our AGS+ router to let telnet access out for   
specific PC's but last time I tried this although I could specify an   
individual machine I couldn't specify Telnet only despite using eq 23.   
It's possible I need to specify something for inbound and outbound telnet   
but I would be grateful for any example configs.

In the long term I am looking for something a bit better and I have been   
interested in socks and use with Windows 95. The problem I can forsee is   
some users may wish to access internal unix systems without using the   
socks server can this be configured ?

One of the reasons for looking at socks as a generic way of permitting   
and monitoring network traffic is because of Microsofts Net meeting and   
ULS ( now Internet Location Server ). I have seen little information on   
how to filter these and any newer products and perhaps socks will allow a   
more general way of dealing with this. Any pointers to information on   
Netmeeting and use of transports appreciated.

I'm not a purist in the firewalls debate I am attempting to implement a   
flexible security system with good security and a reasonable cost. ( they   
still think I'm paranoid ).

Mike Marriage
Systems Engineering Team Leader
City College Norwich ( England )

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