Traditional firewalls focus on blocking simple threats and intrusions.
Business grade Firewalls have added Unified Threat Management (UTM) services such as anti-virus, anti-spyware, intrusion prevention, content filtering and even some anti-spam services to enhance to threat protection.
Most traffic passing through a Firewall is not threat-based, but is instead applications and data. This gave rise to the Application Firewall which can manage and control data and applications that pass through the Firewall.
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