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Beta security platform for mobile devices. Provides encryption of the entire system, including a firewall blocking outgoing connections from Android apps and selective permission for apps to communicate with specific servers.

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Extended version of the ZoneAlarm Free Firewall firewall that provides comprehensive protection against damaging attacks to your computer or the network.

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Use this tool to protect your computer against attacks from the internet (hackers, trojans or spyware). It provides an overview of all inbound and outbound network traffic so you can identify all the suspicious programs and their activities.

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Simplifies the configuration of firewall scripts for iptables and ipchains. The graphical interface is based on modern firewall GUIs and allows easily creating firewall rules to be implemented in a script. Download of the versions for Windows and Mac OS X requires a valid email address. Fast and secure download from The H

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Client for communicating with any IPSec gateway (compatibility list available at http://www.ncp.de). Includes a personal firewall. Separate versions available for Pocket PCs, smartphones and Symbian devices.

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Free firewall for protecting against attacks from the internet. Supports Windows Vista and Windows 7 32- and 64-bit systems.

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Increases security while browsing the internet. Provides a personal firewall, parental control and spam filter. Protects against malware, phishing and automatically blocks dangerous web sites. Supports 32- and 64-bit systems of Windows Vista and 7.

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Free firewall that has all the essential functions for protecting against harmful attacks from the internet and from the creation of unwanted connections. Also available as an extended full version that protects against keyloggers and allows the importing of blacklists. You can compare the functions of the various versions here. Fast and secure download from The H

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Total protection for computers from harm found on the internet and devices connected to the PC.

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Protects against viruses, spyware and phishing. Detects rootkits, checks the authenticity of web sites and contains a two-tier firewall. Also offers automatic backups as well as 2GB of online storage. Available as an enhanced Premier version with 25GB of storage.

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Promises complete protection against threats from the internet, such as fraudulent web sites. Download requires registration.

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This tool provides network protection for operating systems that have been started from a portable disk drive. It enables you to edit access rules and tells you about open connections and denied access attempts. Extended Pro version available. Program is no longer offered.

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Protects Windows PCs against hackers and blocks suspicious incoming and outgoing traffic.

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