Cisco Cisco IOS Software Release 12.4(6)T Fascicule
© 2008 Cisco Systems, Inc. All rights reserved.
18
Cisco IOS Firewall
Trusted Relay Point
Trusted Relay Point
Delivering
Secure
Unified Communications
Provides authentication of firewall open port
requests
requests
Handles asymmetric signaling/media paths
Provides encrypted signaling
FW ports open only for session length
A
CUCM
TLS
(Encrypted
signaling
TRP
RTP
Cisco IOS
Security