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Tunneling with Secure Shell

Remote access to network resources is increasingly a business requirement, but external network threats must be neutralized. A Secure Shell (SSH) capability called port forwarding allows nonsecure TCP/IP data to be tunneled across public and private networks through a secure, encrypted connection. The benefits of port forwarding are illustrated by a series of concrete examples. VanDyke Software's Windows clients and servers provide an end-to-end tunneling solution to secure client/server applications, which may serve as a lightweight alternative to a Virtual Private Network (VPN).

  

Table Of Contents

Tunneling with Secure Shell
Tunneling over the Internet
Tunneling over the Intranet
Tunneling to Shared Resources
How Secure Shell Tunneling Works
How Secure Shell Tunneling Works Continued
Authentication and Access Control
Secure E-Mail for Travelers and Teleworkers
Secure Wireless Access to Corporate LANS
Secure VNC Screen Sharing
Security Implications
Conclusion
Appendix A: Remote Port Forwarding

About the Author: Lisa Phifer is vice president of Core Competence, Inc. , a consulting firm specializing in network security and management technology. Phifer has been involved in data communications, internetworking, security, and network management products for nearly 20 years. She lectures on virtual private networking at industry conferences and has written extensively about a wide variety of network infrastructure, access, and security technologies.