Security guide for H.323 videoconferencing

In the following documents:
- CheckPoint is a trademark or registered trademark of Check Point Software Technologies Ltd. or its affiliates.
- Cisco and PIX are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries.
- The term ‘Linux’ is a registered trademark of Linus Torvalds, the original author of the Linux kernel.
- Microsoft, NetMeeting and Windows are a registered trademarks or trademarks of Microsoft Corporation.
- NetScreen is a registered trademark of NetScreen Technologies, Inc.
- Intel, Pentium, Proshare and Celeron are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries.
- SAINT is a trademark or registered trademark of the SAINT Corporation.
- Snort is a Trademark or Registered Trademark of Sourcefire, INC.
- Solaris is a trademark of Sun Microsystems, Inc. in the United States and other countries.
- Symantec is a registered trademark of the Symantec Corporation.
- WS_Ping ProPack is a trademark of Ipswitch, Inc.