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One Barracuda firewall can easily handle as many as 100,000 users, and several firewalls can be combined to serve an even larger user group. Installation of a Barracuda firewall is easy as there is no software to install, nor do any modifications need to be made to your current email system. Your Barracuda firewall can be up and running within minutes. The intuitive web interface of the Barracuda firewall will monitor, maintain and update itself following installation, ensuring that it stays one step ahead of the latest Internet threats. Updates originate at Barracuda Central, an advanced around the clock security operations center that works continuously to keep your system safe.