A Firewall is a computer program or software, supplemented with an antivirus program, to provide maximum security to your internet communications
This program will prevent the access of unauthorised persons into your computer, and blocks downloads of files or programs from suspicious web pages.
Why do you need a Firewall?
Hackers systematically sweep computers connected to the internet, trying to find open communication ports to get into the computers. A Firewall’s task is to block unauthorised entries to computers, and also to prevent the outflow of information.
What do hackers look for in computers?
Outsiders accessing your computer do not have the best intentions:
- They get access to your confidential information, appropriating the passwords you use for internet services, such as online banking or services included in your antivirus program.
- They take control of your computer, directing all connections, together with others, to a certain website, therefore causing a collapse due to overload. This is known as DoS (Denial of Service).
- Once they have accessed your hard drive, they may configure your computer as a download platform for pirated software distribution, accessible to other users.
Is there any additional risk with modems or DSL connections?
- Even when you are not surfing the web, this type of connection is an open door to the internet, as it requires a fixed-access address to the web.
- In this cases, there is a larger risk of suffering an attack from hackers, unless you have installed a Firewall. A similar danger is present with online connections to other linked computers
- Make periodic security backups of your computer files, in order to overcome the negative effects of a hacker intrusion or a virus attack, by restoring your data
- Common sense is indispensable for fighting computer viruses; always be careful regarding information received in your computer.
- If you receive information from unknown sources, for example, when accessing chats or news groups, reject them however interesting they may seem, as they may contain viruses.
- Before opening a new email message, check it with your antivirus program, even if you know the sender.
- Avoid downloading programs from unsafe places on the internet, and try to confirm that they have been released by a public entity, an editorial company, or an antivirus company.
- Be extremely cautious if you observe suspicious actions in your device, such as: increased size of files, uncommon Windows alerts, reception of emails from unknown senders or in language you do not usually use.
To avoid unpleasant surprises, stay informed regarding new updates of programs, new computer viruses, etc., using various security bulletins that can be found online.
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