Backdoors

Avira AntiVir UNIX Professional
$36.35 - Avira GmbH

Avira AntiVir UNIX Professional offers permanent antivirus protection by smoothly monitoring your system's active processes and blocking malware (viruses, Trojans, backdoors, worms etc) from damaging your most valuable data. You can make your decisions and set the type of action on the infected files: isolate, disinfect, remove. It provides frequent updates via Intranet/Internet Update Wizard to efficiently update program files in the network

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System Shield
$49.95 - iolo technologies

Keep your PC safe on the Internet. Block malware, hackers, and identity thieves. System Shield offers total security with a powerful firewall, antivirus software, a spyware removal tool, and a security optimizer to repair security flaws. System Shield removes tracking cookies that monitor browsing habits, backdoors that enable covert control, and keyloggers that record keyboard and mouse activity. 1 license can be installed on up to 3 machines.

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Mamutu
$27.00 - Emsi Software GmbH

Mamutu monitors in realtime all active programs for dangerous behavior and blocks malicious activities. It recognizes new and unknown Trojans, Backdoors, Keyloggers, Worms, Viruses, Spyware, Adware and Rootkits (Zero-Day attacks), without the need of daily signature updates. Mamutu gives you full control over internal system activities. It's small but very powerful. Mamutu saves resources and does not slow down the PC.

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