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In addition, the Barracuda antivirus system utilizes two separate filtering engines to stop potential system threats. A Barracuda firewall can also filter out email messages containing certain designated extensions. With respect to outgoing email messages, the Barracuda firewall system employs outbound filtering techniques such as attachment scanning, virus filtering, rate control and encryption to ensure that all outgoing mail is legitimate and free of viruses. A Barracuda firewall system requires no software installation or modifications to existing email systems. And, your network administrator will be able to monitor and maintain the firewall through the intuitive web interface.