Enterasys Networks Network Card - Manual (Page 222)

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RiverMaster Administrator’s Guide
Appendix A
Glossary
AutoLink Recovery
An extension of the fault recovery capabilities of the
Aurorean Client
which
includes automatic fail-over to a backup Aurorean Client system in the
event of a service outage or VPN hardware failure. AutoLink Recovery
(ALR) is implemented with the installation of a second Aurorean Client
system consisting of a pair of
Aurorean Policy Servers
and
Aurorean
Network Gateways. The secondary Aurorean Client system operates in
parallel with but independently of the primary Aurorean Client system. Each
system must be located on the same corporate network, but can be physically
situated at different sites for disaster recovery. For more information about
ALR, refer to the ALR Application Note.
Client Synchronization
A two-part process which automatically upgrades
Aurorean Client
firmware and settings by downloading updated files from the
Aurorean
Policy Server . During client synchronization, a portion of the tunnel is
utilized as a management channel between the Aurorean Client computer
and the Aurorean Policy Server, operating in the “background” of the client
connection without any visible effect on performance. Data Synchronization
acquires revised POP, ISP, policy and other configuration data while Software
Synchronization acquires new
Prescriber remedies and updated Aurorean
Client
program files.
Firewall
A combination of hardware and software which limits the exposure of a
corporate network to outside attack by enforcing a boundary between the
network and the Internet. Firewalls normally fall into one of two categories:
application-level or network-level (often referred to as a packet filter). An
application-level firewall examines traffic at the application level, and only
passes packets that are sent by approved applications (such as FTP, E-mail, or
Telnet). This type of firewall often readdresses outgoing traffic so that it
appears to have originated at the firewall rather than an internal host, thereby
concealing the address of the internal host. A network-level firewall examines
traffic at the network packet level, and filters packets based on the destination
and/or source address. The Aurorean Network Gateway offers
Firewall/NAT
Traversal as a policy option to Aurorean Client users such as contractors,
visitors and others, who are connected temporarily on internal networks,