Great Circle Associates Firewalls
(March 1994)
 

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Subject: Re: mis-use of telnet (was: Re: Hey the crackers have a new twist...)
From: Brent Chapman <brent @ mycroft . GreatCircle . COM>
Date: Tue, 29 Mar 1994 08:31:22 -0800
To: lacoursj @ uprc . com (Jeffrey D. LaCoursiere)
Cc: firewalls @ GreatCircle . COM, heiser @ world . std . com
In-reply-to: Your message of Tue, 29 Mar 1994 09:13:50 +0600

lacoursj @
 uprc .
 com (Jeffrey D. LaCoursiere) writes:

# > ... Well how about if the application gateway does not allow internal
# > users to "telnet to a port", but only allows telnet to the standard
# > remote telnet port? ...
# 
# This would be a bummer, as some services require telnet-to-a-port (such
# as the Internet Chess Server).

It would also be pretty ineffective; all the cooperating outsider
would have to do is run their listener on port 23 instead of running
telnetd on port 23 (or even hack the listener into telnetd).


-Brent
--
Brent Chapman         | Great Circle Associates  | Call or email for info about
Brent @
 GreatCircle .
 COM | 1057 West Dana Street    | upcoming Internet Security 
+1 415 962 0841       | Mountain View, CA  94041 | Firewalls Tutorial dates

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