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Session Initiation Protocol (SIP) Enabled Firewall Appliance

Authored on: Apr 5, 2010

Technical Paper

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Real-time communications have become an essential requirement for most enterprises. Whether it is through VOIP, multimedia conferences or instant-messaging, individuals and businesses can enjoy instant communications to save time and money. Generally, almost all instant communication connections are controlled by the Session Initiation Protocol (SIP), that initiates, modifies and terminates sessions between the participants. However, conventional network firewalls do not recognize SIP media, and whenever the firewall must relay SIP media packets for inspection, delays are caused during real-time communications. To speed up the inspection process, some firewalls create an automatic bypass for media packets, which creates a potential loophole for security threats.

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