High Availability - Dell SonicWALL GX250 Manual

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HIGH AVAILABILITY

A reliable Internet connection has become a mission critical requirement for today's
modern business. Internet connections today are used for accessing important real-
time data for decision-making, reaching E-commerce customers, connecting with
business partners, and extending communications across the distributed enterprise.
The loss of this mission critical connection can have serious, and sometimes disastrous,
consequences on an organization.The following applications are examples of the
mission critical nature of an Internet connection today:
• An Internet connection that provides customer access to an E-commerce site. In
this case, connection downtime results in lost revenue.
• An Internet connection used to connect to business partners or an application serv-
ice provider (ASP). Connection downtime can significantly disrupt business activi-
ties.
• Internet connections that provide access to critical resources for remote offices,
telecommuters and mobile workers. Connection downtime can result in lower pro-
ductivity for remote users.
Given the mission critical nature of many Internet connections, each element of the
Internet connection needs to be highly reliable. SonicWALL High Availability adds to the
award-winning SonicWALL Internet security solution by assuring a highly reliable and
secure connection to the Internet.
SonicWALL High Availability is standard on the SonicWALL PRO-VX and the GX product
line. It is available as an upgrade for the SonicWALL PRO. SonicWALL High Availability
eliminates network downtime by allowing the configuration of two SonicWALLs (one
primary and one backup) as a High Availability pair. In this configuration, the backup
SonicWALL monitors the primary SonicWALL and takes over operation in the event of
a failure. This ensures a secure and reliable connection between the protected network
and the Internet.
SonicWALL Internet Appliance Security Guide Page 155