blocking telnet to selected IPs?

[John T. Benedetto]

On Tue, 7 Jul 1998, Dave Vose wrote:

> We may be forced to discontinue email access in the library but we'd like to
> retain telnet capability for access to other OPACs, etc. Is there a way 
> to block telnet access to selected IP addresses in Netscape 3.x and 
> 4.x?

I have never seen anything like this.  The problem is that Netscape is NOT
the program making the connection; the telnet client is. All the browser
does is launch the helper application (in this case, telnet), and passes
the ip address or DNS name. I would think you would need a custom telnet
client to block access in this way. 

Please post any results you get to the list, as I am sure that this is
something that many, many people would like to know how to do.  (I know I
want to know!)

John


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   John Thomas Benedetto, User Support Analyst II       jbenedet at unm.edu
   Centennial Science & Engineering Library,               (505)277-2598
   University of New Mexico, Albuquerque, NM  87131-1466