ASHLAND, OR. — July 12, 2005 — Open Door Networks Inc. today announced
that it was shipping version 1.0 of its DoorStop X firewall for Mac OS X
10.3 and later. Previously available as a public beta release, DoorStop X
returns Open Door to a market it pioneered seven years ago. The DoorStop X
firewall provides important Internet security features beyond those of the
firewall built into Mac OS X, while at the same time being easier to use
than any firewall on the market.

To secure their machines, Mac users simply download DoorStop X and
double-click the application. A built-in setup assistant walks the user
through the basics of configuring and activating firewall protection. By
default, the setup assistant blocks and logs all service-level access
attempts to the user’s machine. For users who wish to selectively but
securely allow access to certain services on their machine, DoorStop X
provides easy-to-use lists of most common Mac services. Other features of
DoorStop X include:

* Ability to allow or deny service-by-service access from specific
machines, Internet address ranges, or all of a user’s home network

* Default settings for any service not specifically configured by the user

* Full logging of allowed and/or denied access attempts

* Optional blocking and logging of low-level “UDP” and other access attempts.

Although Mac OS X has included a basic firewall for some time, even Mac OS
10.4 Tiger’s version of that firewall lacks the features required for many
consumer and office uses. DoorStop X logs all access attempts from the
Internet and provides other advanced features missing from Tiger’s
firewall. “Mac OS X’s built-in firewall is a good introduction to the need
for firewall protection,” said Alan Oppenheimer, president of Open Door
Networks. “DoorStop X picks up where the built-in firewall leaves off,
providing critical features like full logging and the ability to
selectively allow access from other machines.”

DoorStop X is particularly powerful when combined with Open Door’s Who’s
There? Firewall Advisor, which it invokes automatically if installed. Who’s
There? displays DoorStop’s log in an easy to understand format, analyzing
that log in real-time and helping users notice those access attempts that
they should be concerned with. Who’s There? provides
otherwise-hard-to-obtain details on all logged access attempts, and helps
users take action to get attacks stopped.

Open Door Networks started the Macintosh firewall market in 1998 with its
groundbreaking DoorStop 1.0 product, which ran on Mac OS 8.1 through,
eventually, 9.2. Originally intended to protect Macintosh servers, DoorStop
proved even more critical in protecting end-user Macs as they migrated to
now-common broadband Internet connections. DoorStop technology was licensed
by Symantec Corporation and used as the basis for their Norton Personal
Firewall for Macintosh product.

A free, fully-functional evaluation release of DoorStop X, along with
additional details on the product and Macintosh firewalls in general, is
available at . Through August 15,
DoorStop X can be purchased off the site for the special introductory price
of $39, or $59 when bundled with Who’s There? Volume and site licenses and
educational discounts are also available.

Open Door Networks, Inc. is a leading provider of Internet security
solutions for the Macintosh. Open Door was founded in 1995 by Alan
Oppenheimer, co-creator of the AppleTalk network system and co-author of
the book “Internet Security for Your Macintosh: A Guide for the Rest of
Us.” 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.