Get a Firewall
What is a firewall?
A firewall is a tool that can either be hardware
or software. Its purpose is to protect computers
against threats from intruders breaking into your
computer or network via the Internet by:-
- accessing the data on your computer;
- running programs designed to spread malicious
code to other computers over the Internet.
Types of Firewall
Firewalls can be classified into 2 types - software
and hardware firewalls.
- Software firewall: this type is installed
on a personal computer, e.g. the Windows firewall.
Nowadays, a number of anti-virus software applications
are also bundled with software firewalls.
- Hardware firewall: this type is purchased
as a stand-alone product and is often integrated
with routers into your system and network. The
computers sharing the same router are simultaneously
protected by the same hardware firewall. These
firewalls can protect every machine on a local
Both hardware and software firewalls can be used
at the same time to protect your computer and
network, but it is always a good idea to have
firewall installed and enabled for each individual
computer before connecting to the Internet.
here for a sample list of personal firewalls.