Welcome to the DoorStop X Firewall, from Open Door Networks, developers of the Mac's original firewall (DoorStop for Mac OS 8.1). With the DoorStop X Firewall you can quickly and easily secure your Mac against undesired access from the Internet. You can also learn about important aspects of Internet security in general, through the firewall's integration with other components of the DoorStop X Security Suite, such as our book, Internet Security for Your Macintosh. Chapter numbers and section names of relevant passages from this book are indicated throughout this User's Guide in blue italics.

There are a number of new items in DoorStop X 2.2. For details on new features, see the What's New section of this user's guide.

Table of Contents

What's New in 2.2	Enhancements Integration with the Who's There? Firewall Log Analyzer Integration with "Internet Security for Your Macintosh" DoorStop X Security Suite
Getting Started	System requirements DoorStop X & other firewalls Installation Upgrading Quick start Online Help Purchasing DoorStop X Entering a serial number Related products
DoorStop X Basics	Key concepts IP addresses Ports Packets & protocols Using DoorStop X
Protecting Basic Services	The setup window Protecting a service Editing and deleting built-in service entries Adding an address to a service's address list Changing/deleting an address in a service's address list Further information about a service
User-defined Services	The setup window Creating a new service entry Duplicating user-defined service entries Editing & deleting user-defined service entries Custom icons Further information about a service
Configuration Tips	Personal File Sharing iApps and OS X's built-in firewall iChat iTunes iPhoto Apple Remote Desktop Internet Sharing FTP clients
Accessing "Internet Security for Your Macintosh"	Browsing Information on a specific service The standalone version of Internet Security for Your Macintosh
Logging	Logging overview Setting logging defaults Setting service-specific logging Log file details and archiving Resetting the log file Viewing the log file
Advanced Topics	UDP protection Stealth mode IPv6 protection Turning off Tool Tips Using the status icon Locations Testing DoorStop X What clients will see Uninstalling DoorStop X Update information
Troubleshooting	Common problems & their solutions
Appendices	Notes on installation TCP & UDP port numbers Log file format Sample log lines Reading the log file