SRTP - Overview

Overview:

SIP SRTP on the IMG 1010 utilizes RFC 3711 (The IP media layer security standard) and RFC 4568 (The IP signaling security standard). The IMG provides security, confidentiality, message authentication, and replay protection for both RTP and RTCP packets. This is accomplished using a cryptographic key and other parameters that serve to configure security. Initially feature F-0784 SIP Signaling over TLS was introduced to make the IP signaling layer secure. Now in software 10.5.3 SRTP and SRTCP are added to make the voice and data secure over the RTP stream. The information below is an Overview of what is supported on the IMG. Also there are links in the Related Topics section. Click on each link for more information on the SRTP feature.

 

 

Related Topics:

SRTP - Configuration

SIP SRTP CryptoSuite

IMG 1010 - Licensing

License Info

Setting Host Flag

SIP SGP Pane

 

SRTP Network Diagram:

 

dg_f1290_sip_srtp.png

 

 

 

Call Flow Diagrams:

SIP Inbound:

Below is a basic SIP Call Flow which has TLS and SRTP enabled. Click on each of the messages to display the Call Trace information for that message.

 

cf_f1290_sip_inbound.png

 

SIP Outbound:

Below is a basic SIP Call Flow which has TLS and SRTP enabled. Click on each of the messages to display the Call Trace information for that message.

 

cf_f1290_sip_outbound.png

 

Additional Information:

 

Profile #

VoIP Module Resources (SRTP Enabled)

VoIP Module PResources (SRTP Disabled)

Profile 5

336 Resources

512 Resources

Profile 6

288 Resources

336 Resources

Profile 7

288 Resources

336 Resources