Kerio Tech KERIO WINROUTE FIREWALL 6 User Manual download pdf (Page 357)

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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 Internet Explorer in Microsoft Windows operating systems.

Cluster

A group of two or more workstations representing one virtual host (server). Requests

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

A virtual bidirectional communication channel between two hosts.

See also TCP

DDNS

DDNS (Dynamic Domain Name System) is DNS with the feature of automatic update of

records.

Default gateway

A network device or a host where so called default path is located (the path to the Inter-

net). 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 destination

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 com-

puters 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 ad-

dress, DNS server address, local domain name, etc.

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Kerio Tech KERIO WINROUTE FIREWALL 6 User Manual Page 357