| Portknocking Firewall | With this free program you can adjust your computer to open ports just on demand of permitted clients. |
| ZoneAlarm | Get a Firewall to protect your computer. Basic Version is good and for free. Higher versions have to be purchased |
| Jetico | Securitytools for download: encryption, firewall and diskwiping softwaretools. |
| Process Information | Website that describes the processes running on computers |
| Sophos | Software and appliance solutions to protect networks from viruses, Trojans, worms, spyware and spam |
| audit my pc | Free online firewall security and internet speed test |
| Symantec Security Scan | Let them try to spy your computer to find out how save you are. |
| Shields UP! | Let them try to spy your computer to find out how save you are. |
| Kaspersky | Well known developer of antivirus software |
| Jotti | You can upload a suspicious file and it will be immediately scanned by several virusscanners |
| audit my pc | Free online firewall security and internet speed test |
| ssdeep | Recursive computing and matching of Context Triggered Piecewise Hashing (Fuzzy Hashing). Useful for Digital forensic. |
| Trojaner-Info | Hilfe und Informationen bei Trojanischen Pferden, Computerwürmern und Computerviren. |
| Antiviruslab | Nachrichten und Informationen über Viren |
| AntiVir | Kostenloses Virenprogramm zum privaten Gebrauch, das etwa 70.000 Viren erkennt und entfernt. |
| McAfee | Anti-Virus-Programs and Firewalls for purchase. |
| Virus Total | Online Viruscheck: Upload suspicious files to let them be checked by several recent virusscanners. |
| Agax | free Apple Macintosh antivirus program |
| Avast | Antivirus software for purchase or free download for home users for non-commercial use |
| Kaspersky | Well known developer of antivirus software |
| Sophos | Software and appliance solutions to protect networks from viruses, Trojans, worms, spyware and spam |
| BitDefender | Antivirensoftware, von der es aus eine kostenlose Version zum Download gibt. |
| Jotti | You can upload a suspicious file and it will be immediately scanned by several virusscanners |
| GFI | Software developer for security and messaging software |
| Symantec Protection Side | Recent Virus Warnings and removal tools on the page of one of the leading anti-virus research organizations. |
