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G Data ClientSecurity
software from forwarding data about your listening habits (outgoing
connections) or to ensure that program updates are not downloaded
automatically (incoming connections).
· Open or disable a specific Internet service (port): A Port is a specific
address area that automatically forwards data transferred over a network to
a specified protocol and then via this to specified software. For example,
standard websites are transferred via port 80, while email is sent via port
25 and received via port 110, etc. Without a firewall, all ports on your
computer normally remain open, although the majority of users do not
need most of these. Blocking one or more of these ports is a quick way of
eliminating vulnerabilities that could be used for attacks by hackers. The
wizard provides the option of blocking ports completely or for a particular
application only (e.g. your MP3 player software).
· Allow or deny file and printer sharing (NetBIOS): NetBIOS is a
special interface in networks that can be used, for example, to share files
or printers directly between one computer and another without using the
TCP/IP protocol, for instance. It is often advisable to deny sharing for
untrustworthy networks, as this is generally not necessary for home
networks and the NetBIOS can also be used by hackers to compromise a
computer.
· Allow or deny domain services: A domain is a type of classification
directory for computers on a network which allows the computers linked to
the network to be managed centrally. Enabling for domain services in
untrustworthy networks should generally be denied.
· Enable Internet connection sharing: If your system connects directly to
the Internet you can determine whether all computers connected via a
TCP/IP network should have access to the Internet or not. This Internet
connection sharing (ICS) can generally be activated for home networks.
· Switch to the extended edit mode (advanced dialogue): This allows
you to move from the Rule wizard to the advanced dialogue. For further
information on the advanced dialogue, see the section Using the
advanced dialogue.
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If you remove the checkmark next to Always launch the Rule
wizard in the future checkbox, the firewall will automatically open
the advanced dialogue to define new rules.