is the Internet?
is a Router?
is a Firewall?
a modem at home for a few hours a day gives little time for your
computer to be seen over the Internet.
Each time you connect to your ISP you use a different IP address.
Also many ISP’s provide some form of protection for dial up clients.
However you should always use a software firewall for your own
protection, just as you would close your house doors when you are not
Using ADSL at home would have some basic security if it uses NAT and
variable IP addresses. (Network Address Translation, Internet Protocol)
BT still recommends that all users install a Firewall.
In the office
provides Internet access at 500k or 2000k bits per second on download
It is ‘always-on’ and is an ‘open gateway’ from the Internet
With NO Firewall and NoNAT and fixed IP (to enable dial in from home or
remote office) everyone on the Internet has access to all of your
Everyone with ADSL must have a Firewall to give some level of security
for the protection of the system. The firewall can be software, hardware
ADSL as the front door to your office. Leave the door open 24 hours a
day for 7 days per week and you can be sure that someone will walk in
and look around. Maybe there is nothing to steel, maybe they plan to
return later or maybe they just leave a mini-camera to watch what is
There are many people and dubious businesses in countries around the
world whose aim is to get hold of your valuable information. This
information could be the passwords to your bank, your commercial
information or logins for your supermarket shopping. These data thieves
set up numerous computers to automatically find new IP addresses and
register them for attack.
do not want any of our clients to experience computer theft. We
therefore insist that systems are secure before connecting to the
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