Does Srtp use TCP or UDP?

Description:

Does Skype use SRTP?

Protocols help protect enterprise communications Skype Connect now provides Transport Layer Security (TLS) and Secure RTP (SRTP) protocols for encrypting both SIP messages and RTP (media streams) between your IP-PBX, Media Gateway, or UC (Unified Communications) platform and Skype Connect.

Where is Srtp used?

DTLS is used for encrypting data streams, while SRTP is used for encrypting media streams. However, DTLS-SRTP is typically used to perform the SRTP key exchange to detect any man-in-the-middle attacks. The IETF documents WebRTC security and security arch cover these aspects in detail.

What kind of RTP is used in Lync?

Lync also uses RTP to transmit DTMF tones, the tones generated when you press keys on the phone keypad. The method for using RTP in this way is defined in RFC 2833. Lync generally sends media via an encrypted form of RTP, called SRTP, but it can communicate in unsecured RTP if necessary (and if security settings allow).

Which is SIP transport for Microsoft Lync 2010?

For the purposes of this article it is assumed that PBX – SBC – Microsoft Lync 2010 configuration is in place already with MTLS/SRTP as SIP Transport. The process requires changes on both the SBC and on the Lync Server.

How to change sip from MTLs-SRTP to TCP?

In the Navigation Tree, go to Branch Sites > PSTN gateways > (relevant SBC entry). Right-click the relevant SBC. Select Edit Properties… Change the Listening Port for IP/PSTN gateway to 5068, as shown below. Change the SIP Transport Protocol to TCP, as shown below.

What’s the difference between RTP and SRCP in Skype?

RTP (or SRTP) carries the media codecs streams whilst RTCP (or SRTCP) facilitates and controls the media streams. Just because two endpoints might support common media codecs, it does not mean that they also use compatible transport protocols.