- Kerio WinRoute Firewall Administrator's Guide

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Glossary of terms
ActiveX
This Microsoft’s proprietary technology is used for creation of dynamic objects
for Web pages. This technology provides many features, such as writing to disk
or execution of commands at the client (i.e. on the host where the Web page is
opened). This technology provides a wide range of features, such as saving to disk
and running commands at the client (i.e. at the computer where the Web page
is opened). Using ActiveX , virus and worms can for example modify telephone
number of the dial-up.
ActiveX is supported only by Microsoft Internet Explorer in Microsoft Windows op-
erating systems.
Cluster
A group of two or more workstations representing one virtual host (server). Re-
quests to the virtual server are distributed among individual hosts in the cluster, in
accordance with a defined algorithm. Clusters empower performance and increase
reliability (in case of dropout of one computer in the cluster, the virtual server
keeps running).
Connections
Bidirectional communication channel between two hosts. See also TCP.
Default gateway
A network device or a host where so called default path is located (the path to the
Internet). To the address of the default gateway such packets are sent that include
destination addresses which do not belong to any network connected directly to
the host and to any network which is recorded in the system routing table.
In the system routing table, the default gateway is shown as a path to the destina-
tion network 0.0.0.0 with the subnet mask 0.0.0.0.
Note: Although in Windows the default gateway is configured in settings of the
network interface, it is used for the entire operating system.
DHCP
DHCP (Dynamic Host Configuration Protocol) Serves automatic IP configuration of
computers in the network. IP addresses are assigned from a scope. Besides IP
addresses, other parameters can be associated with client hosts, such as the default
gateway address, DNS server address, local domain name, etc.