By Mike Erwin
Historically, merely huge businesses may perhaps come up with the money for safe networks, which they made from pricey leased traces. Smaller parents needed to make do with the fairly untrusted net. these days, even huge businesses need to pass outdoor their deepest 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 in your organization?The resolution is a digital deepest community: a suite of applied sciences that creates safe connections or "tunnels" over common net lines--connections that may be simply utilized by anyone logging in from wherever. a couple of items now exist that will help you boost that solution.This publication tells you the way to plot and construct a VPN. It begins with common issues like expenses, configuration, and the way a VPN suits in with different networking applied sciences like firewalls. It keeps with precise descriptions of the way to put in and use VPN applied sciences which are to be had for home windows NT and Unix, resembling PPTP and L2TP, Altavista Tunnel, Cisco photographs, and the safe shell (SSH).New positive factors within the moment version contain SSH, that's a well-liked VPN resolution for Unix platforms, and an accelerated description of the IPSec commonplace, for which numerous proprietors have introduced support.Topics include:
- How the VPN compares to different to be had networking technologies
- Introduction to encryption, firewalls, the IPSec common, and different applied sciences that allow VPNs work
- Point to indicate Tunneling Protocol (PPTP) and L2TP
- The Altavista Tunnel
- The Cisco portraits Firewall
- Secure Shell (SSH)
- Maintenance and troubleshooting
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