Computer security is an integral part of maintaining security in your life and in your work. An intruder able to break into your computer may find access to some very secure information including passwords, bank account information, and social security numbers. Thankfully, most computers have can be protected by installing a firewall and antivirus software.
Firewall
The firewall protects computers from unauthorized users by carefully checking all messages on the Internet. Firewall techniques include the packet filter, application gateway, circuit level gateway and proxy server, all of which screen potential users for damaging behaviors. The packet filter, for example, looks closely at each packet using the network to determine if it is safe or unsafe, accepting or rejecting each packet. Application gateway screens FTP and Telnet servers, and circuit-level gateway searches TCP and UDP connections. Both block the servers and connections that may not be safe. Finally, the proxy server hides the network address–which when the address is known can allow criminals to hack your computer. Hiding the network address thereby protects your computer from possible harm.
Antivirus Software
Another important security software, antivirus software, protects the computer from viruses. Although the firewall can decrease susceptibility to internet communications, some viruses may still be able to sneak through. For this reason, antivirus software is an important part of the security package. Working by blocking known viruses and variations of known viruses, antivirus software protects the computer from attack.
Also able to test packets for viruses by running them through a sandbox, the antivirus tests can determine if a packet leans toward harmful activities. Viruses, however, are ever-changing, and software updates and add-ons may be continuously necessary for complete virus control.
Together, a firewall and antivirus software can block intruders, test packets, deter viruses and protect your computer from cyber criminals, safeguarding your computer and your information.