OPEN DOOR NETWORKS SHIPS THE "WHO'S THERE?" FIREWALL ADVISOR

ASHLAND, OR. -- January 15, 2001 -- Open Door Networks Inc. today shipped
its new "Who's There?" Firewall Advisor. Available immediately, "Who's
There?" Firewall Advisor provides the next step in Internet security by
helping users analyze and investigate access attempts to their Macintosh.
With "Who's There?" Firewall Advisor users can determine the level of risk
of an "attack" detected by their personal firewall, find the name, email
address and phone number of an administrator associated with the attacker's
network, and even automatically draft an email to that administrator.

With the ever-growing number of computers connected to the Internet through
"always on" connections, there has been a significant increase in the
number of hackers attempting to infiltrate those computers. Personal
firewalls have been developed to thwart those attempts. As the number of
attempts has risen, however, users have become increasingly confused as to
the degree to which they should be concerned and what they can do in
response. "Who's There?" Firewall Advisor works with the user's firewall to
answer those questions.

"Open Door pioneered the Macintosh firewall market with our DoorStop
product line," said Alan Oppenheimer, president of Open Door Networks.
"But, as access attempts continue to increase, our customers need even more
information than provided by their firewall's logging capabilities. We
think 'Who's There?' Firewall Advisor will provide them with what they need
to really understand what they should and should not be worried about, and
to take action as needed."

"Who's There?" Firewall Advisor works with Open Door's DoorStop Personal
and Server Editions and with Symantec's recently announced Norton Personal
Firewall, which is based on technology licensed from Open Door. Features of
"Who's There?" include:

- Advanced Access History window displaying all logged access attempts and
including security risk level and host name of the accessor.

- Windows summarizing access attempts by service type and accessor IP address.

- Built-in information about the most common attacks and their
applicability specifically to the Macintosh environment (many attacks are
targeted at, and effective only against, Windows or Unix machines).

- Automated "Whois" lookup to determine details of the accessor's network,
including administrator name, address, phone number and email.
Administrator's address plotted on a world map.

- Automated drafting of an email that can be used to notify the
administrator of the access attempt and provide the administrator with
details that may be useful in tracking the attempt.

"Who's There?" Firewall Advisor is priced at $39 for a single license, with
volume and educational discounts available, and can be purchased directly
from Open Door's Web site. Additional information on "Who's There?" along
with a free evaluation version of the product is available off the "Who's
There?" Web site at http://www.opendoor.com/whosthere/.

Open Door Networks, Inc. is a leading provider of Internet security
solutions for the Macintosh, and the developer of Mac OS 9's TCP/IP File
Sharing feature. Open Door 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 based in Ashland, Oregon.