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NTRODUCTION
1-5
the incoming traffic is allowed. If no match is found, the
incoming traffic is discarded.
• Virtual Private Network (VPN)
The Wireless Barricade Plus supports two of the most commonly
used VPN protocols – PPTP and IPSec. These protocols allow
remote users to establish a secure connection to their corporate
network. If your service provider supports VPNs, then any of these
protocols can be used to create an authenticated and encrypted
tunnel for passing secure data over the Internet (i.e., a
traditionally shared data network). The VPN protocols
supported by the Wireless Barricade Plus are briefly described below.
• Point-to-Point Tunneling Protocol (PPTP) – Provides a secure
tunnel for remote client access to a PPTP security gateway. PPTP
includes provisions for call origination and flow control required
by ISPs.
• IP Security (IPSec) – Provides IP network-layer encryption. IPSec
can support large encryption networks (such as the Internet) by
using digital certificates for device authentication.