By Mike Erwin

Historically, purely huge businesses may perhaps manage to pay for safe networks, which they produced from dear leased strains. Smaller fogeys needed to make do with the particularly untrusted web. these days, even huge businesses need to pass open air their inner most nets, simply because such a lot of humans telecommute or log in whereas they are at the street. How do you supply a inexpensive, safe digital community to your organization?The answer is a digital inner most community: a set of applied sciences that creates safe connections or "tunnels" over standard web lines--connections that may be simply utilized by anyone logging in from at any place. a few items now exist that will help you enhance that solution.This e-book tells you the way to plot and construct a VPN. It begins with normal issues like expenses, configuration, and the way a VPN matches in with different networking applied sciences like firewalls. It maintains with specified descriptions of ways to put in and use VPN applied sciences which are to be had for home windows NT and Unix, comparable to PPTP and L2TP, Altavista Tunnel, Cisco pictures, and the safe shell (SSH).New good points within the moment version comprise SSH, that is a well-liked VPN answer for Unix structures, and an improved description of the IPSec common, for which numerous proprietors have introduced support.Topics include:

  • How the VPN compares to different on hand networking technologies
  • Introduction to encryption, firewalls, the IPSec typical, and different applied sciences that permit VPNs work
  • Point to indicate Tunneling Protocol (PPTP) and L2TP
  • The Altavista Tunnel
  • The Cisco images Firewall
  • Secure Shell (SSH)
  • Maintenance and troubleshooting

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