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48-1
Cisco ASA 5500 Series Configuration Guide using ASDM
48
Configuring Inspection for Voice and Video
Protocols
This chapter describes how to configure application layer protocol inspection. Inspection engines are
required for services that embed IP addressing information in the user data packet or that open secondary
channels on dynamically assigned ports. These protocols require the ASA to do a deep packet inspection
instead of passing the packet through the fast path. As a result, inspection engines can affect overall
throughput.
Several common inspection engines are enabled on the ASA by default, but you might need to enable
others depending on your network.
This chapter includes the following sections:
• CTIQBE Inspection, page 48-1
• H.323 Inspection, page 48-2
• MGCP Inspection, page 48-14
• RTSP Inspection, page 48-19
• SIP Inspection, page 48-24
• Skinny (SCCP) Inspection, page 48-37
CTIQBE Inspection
This section describes CTIQBE application inspection. This section includes the following topics:
• CTIQBE Inspection Overview, page 48-1
• Limitations and Restrictions, page 48-2
CTIQBE Inspection Overview
CTIQBE protocol inspection supports NAT, PAT, and bidirectional NAT. This enables Cisco IP
SoftPhone and other Cisco TAPI/JTAPI applications to work successfully with Cisco CallManager for
call setup across the ASA.
TAPI and JTAPI are used by many Cisco VoIP applications. CTIQBE is used by Cisco TSP to
communicate with Cisco CallManager.