Cisco ASR 5000 series Product Overview page 581

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Session Control Manager Overview
Least Cost, Congestion Based, Call Type, Domain Based
As a SIP ALG, supports signaling and media routing with overlapping address ranges
SIP Application-level Gateway (SIP-ALG)
SIP NAT Traversal
SIP NAT (IPv4 <–> IPv6 translation)
Media Relay (Header Manipulation): RTP, MSRP
Call Admission and Access Control
Access Control based on IP, URL, SIP Identity, and Session Limits
Topology Hiding Inter-network Gateway (THIG)
CALEA Support
SIP and media taps
SIP Security
Prevent Theft of Service
Prevent Registration Hijacking
Prevent Message Tampering (IPSec)
Prevent Early Session Tear Down
Mitigate SIP Denial of Service (DoS)
OL-22938-02
Prevent CSCF bypass
Robust authentication procedures
SIP message checking
Authenticate Re-Register (S-CSCF)
Early IMS Security: DoS attack prevention, impersonating a server
UA authentication (prevent server impersonation)
AKA authentication mechanism (further protection)
Early IMS Security prevents a different user releasing existing session
P-CSCF DoS Attack Prevention
Blocking of user/IP address
after repeated authentication and bad request failure in Register/INVITE
Dropping of Register
containing Contact header pointing to CSCF service ip:port
Limited number of contacts on which Forking is allowed
Dropping of Requests
coming from source address other than the Register request's source address
Product Description ▀
Cisco ASR 5000 Series Product Overview ▄

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