The Who's There? Firewall Advisor, from Open Door Networks, works with your Macintosh's firewall to help you analyze, understand and respond to access attempts detected by the firewall. Who's There? reads the log file produced by your firewall, and then allows you to:

• view access attempts based on several criteria, including date and risk level
• analyze access attempts to determine factors like risk level
• understand issues associated with specific access attempts, as well as broader security concerns
• summarize accesses by IP address and service type (port number)
• investigate details of the accessor's IP address, including their network's location and administrator's email address
• draft an email to the network administrator about the access

Who's There? analyzes access attempts and provides advice specific to the Mac OS X environment. It's also integrated with our book, Internet Security for Your Macintosh and iPhone, security blog (isfym.com), Twitter stream (http://twitter.com/isfym), and "Top 10" list. Chapter numbers and section names of relevant passages from the book are indicated throughout this User's Guide in blue italics.

For details of new features in Who's There? 2.3, see the What's New section of this user's guide.

Table of Contents

What's New in 2.3	Enhancements Integration with the DoorStop X Firewall Integration with Internet Security for Your Macintosh and iPhone The DoorStop X Security Suite
Getting Started	System requirements Basic concepts Installation & quick start Upgrade installations Purchasing Who's There? Related products
Main Window	Data filters The filter field Data view tabs Access History detail Summary by service Summary by IP address Sorting the data Action buttons Service Info Who's There? Draft Email Searching the data Exporting data Extra information on services
Who's There? Dialog	WHOIS database search Draft email Map Service info Information about a service Accessing DoorStop X from Who's There?
Other Windows	General Preferences Log files log resetting & archiving search order year data choosing another log file Email template Display Preferences Icon size Highlight new lines Omit duplicate lines Columns Lookup IP address Online help
Accessing the Book, the Blog, and Twitter	Browsing Information on a specific service The standalone version of "Internet Security for Your Macintosh and iPhone"
Investigating Accesses	Investigating possibly malicious activity and other problems
Troubleshooting	Common problems & their solutions
Appendices	Mac OS X 10.4 built-in firewall Who's There?, firewalls and home routers Common port numbers Firewall log file formats

This entire User's Guide is copyright (C) 2000-2009 Open Door Networks, Inc. Who's There? Firewall Advisor and DoorStop X are trademarks of Open Door Networks, Inc. Norton Personal Firewall is a trademark of Symantec Corporation. All other trademarks are owned by their respective companies.