A firewall is hardware or software that detects and blocks viruses and hackers before they reach your computer or home network. McAfee® Personal Firewall software sets rules to control communications from other computers, websites and applications. If the firewall detects network communication that does not have a rule defined for handling it, an alert prompts you to allow or block that communication.
The software offers five security levels.
|Full access||No action is required for connections to be allowed.|
|Outgoing access (Default level)||Little or no action is required for connections to be allowed. Only inbound events prompt user permission.|
|Monitored access||Alerts allow you to grant access for applications once. Any future changes must be made manually.|
|Stealth||Blocks all connections you haven’t configured a rule for. Hides your computer's presence on the Internet.|
|Lockdown||Blocks all connections. This is similar to unplugging the network cable.|
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