Great Circle Associates Firewalls
(March 1994)
 

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Subject: IP filtering/port question
From: lemke @ MITL . Research . Panasonic . COM (Kennedy Lemke)
Date: Thu, 24 Mar 1994 17:52:58 -0500
To: firewalls @ greatcircle . com

Hello--

We use an IP filtering scheme for our internet gateway.  We allow packets
over port 1024 through to allow for outgoing ftp, telnet, etc., and we
only allow packets on certain ports below 1024 through (DNS, SMTP, etc.).  

But we specifically DISallow X packets (6000-6010), and openwindows
packets (2000-2010) for example.  Are there any other specific packets
that should be disallowed over 1024?  For example, are Xview packets
in the 2000 range, or 3000 range.  Other packets?  Thank you.

				Kennedy Lemke
    ,    ,     ___  ______	
   /|   /|     /      /     /	Computer Systems Manager
  / |  / |    /      /     /	Postmaster && News administrator
 /  | /  |   /      /     /	Matsushita Information Technology Laboratory
/   |/   | _/_     /     /____	Panasonic Technologies, Inc.
				2 Research Way
Work Phone: (609) 734-7329	Princeton, New Jersey  08540-6628
Fax:        (609) 987-8827	Email: lemke @
 Research .
 Panasonic .
 COM

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