SBC Cheatsheet:
Why Firewalls are Not Enough

Firewalls and Unified Threat Management (UTM) are ubiquitous in today’s networks as they offer comprehensive protection against blended threats. But these devices offer little coverage in VoIP security protection. Firewalls and UTM focus on data security, email, web, worms, trojans and so on. None of these data applications are “real time”, where VoIP requires immediate application of security policies.