Contact: Charles McHenry
541-772-2382
cmchenry@opendoor.com

OPEN DOOR NETWORKS SHIPS DOORSTOP

MACINTOSH-BASED FIREWALL ENHANCES SERVER SECURITY

ASHLAND, OR. -- September 9, 1998 -- Open Door Networks Inc. today
announced that it had begun shipping a major new Mac OS security product.
DoorStop (TM) is a software-based "firewall" product which lets server
administrators specify client IP addresses that should be denied access to
particular services. The product can also keep a log of all access attempts
to the server. DoorStop enhances the security of Macintosh servers by
providing additional levels of protection and logging, above and beyond
those already built into the Mac OS and the servers themselves.

Unlike conventional, hardware-based firewalls, a copy of DoorStop is
installed directly on the servers where its features are desired. By
distributing the firewall functionality down to the particular servers
being protected, DoorStop can provide additional levels of flexibility and
a significantly simplified user interface, plus overall cost savings.

DoorStop 1.0 supports Macintosh servers which use TCP/IP protocols and is
specifically targeted at Open Door's ShareWay IP product line, Apple's
AppleShare IP and StarNine Technology's WebSTAR. "The combination of
DoorStop, WebSTAR 3.0 and the Mac OS work to provide an Internet solution
that is highly functional, incredibly easy to use and very, very secure,"
said Eric Zelenka, product manager for WebSTAR. "Security is something that
can never be taken too seriously, and, with DoorStop, server administrators
have a very powerful new security option."

DoorStop is especially useful when run with ShareWay IP. ShareWay IP
enables previously AppleTalk-only AFP (AppleTalk Filing Protocol) servers
to communicate over the Internet or an intranet. This increasingly
essential capability greatly expands the reach of AFP servers such as the
Mac's built-in personal file sharing. It also, however, exposes those
servers, for the first time, to access from beyond an organization's
AppleTalk network, requiring the additional security provided by DoorStop.

DoorStop features include:

- connection filtering by destination port number (specific service type)
- connection filtering by client IP address or address range
- connection filtering by server IP address on multihomed machines
- optional logging of both allowed and denied connection attempts.

DoorStop requires a PowerPC processor, Mac OS 8.1 and Open Transport 1.3 or
later. A free evaluation version is available off the DoorStop Web site at
http://www.opendoor.com/doorstop/ along with additional information on the
product. The retail price for a single copy of DoorStop is $299, with an
educational price of $199. Through October 15, the product is available at
the special introductory price of $199 ($149 educational). Volume and site
licenses are also available.

Open Door Networks, Inc., a pioneer in the field of Internet tools for
Macintosh computers, was founded in January, 1995 by Alan Oppenheimer, an
11-year Apple veteran and co-creator of the AppleTalk network system. Open
Door's mission is to provide Macintosh users with Internet solutions that
are as easy-to-use and as powerful as the Macintosh itself. Open Door
Networks is located in Ashland, Oregon.