Network Security, Firewalls, and VPNs, 3rd Edition

Using Remote Access

VPNs allow remote users to connect to a private network over a public network. The private network is the organization’s internal network. The public network is often the Internet, but it is also possible for an organization to use leased lines from a telecommunications company to create the VPN connection.

Remote users can be:

• Salespeople on the road
• Field technicians
• Consultants working in customer work sites
• Anyone authorized who needs to have access to internal company resources while away

Because data transmits over a public network, it needs protection. VPNs use tunneling protocols to establish secure connections. These tunneling protocols include different types of encryption to protect the data.

The Technology ...