User guide

164 WatchGuard Firebox X Edge
block cypher
A symmetric cipher operating on blocks of plain text and cipher text, usually 64
bits.
blocked port
A security measure in which a specific port associated with a network service is
explicitly disabled, blocking users outside the firewall from gaining access to
that service port. A blocked port takes precedence over any service settings that
are generally enabled.
blocked site
An IP address outside the Firebox explicitly blocked so it cannot connect with
hosts behind the Firebox. Blocked sites can be manual and permanent, or
automatic and temporary.
Blue Screen of Death (BSoD)
A condition in which a Windows NT–based system encounters a serious error,
the entire operating system halts, and a screen appears with information
regarding the error. The name comes from the blue color of the error screen.
boot up
To start a computer.
Branch Office Virtual Private Networking (BOVPN)
A type of VPN that creates a secure tunnel over an unsecure network, between
two networks that are protected by the WatchGuard Firebox System, or between
a WatchGuard Firebox and an IPSec-compliant device. It allows a user to
connect two or more locations over the Internet while protecting the resources
on the trusted network and the optional or a less trusted network.
bridge
A piece of hardware used to connect two or more networks so that devices on
the network can communicate. Bridges can only connect networks running the
same protocol.
broadcast
A network transmission sent to all nodes on a network.
broadcast address
An address used to broadcast a request to a network, usually to discover the
presence of a machine.
browser
See
Web browser .
bus topology
A networking setup in which a single cable, such as thin Ethernet, is used to
connect one computer to another.