Book Image

Mastering FreeSWITCH

By : Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold
4 (1)
Book Image

Mastering FreeSWITCH

4 (1)
By: Russell Treleaven, Seven Du, Darren Schreiber, Ken Rice, Mike Jerris, Kalyani Kulkarni, Florent Krieg, Charles Bujold

Overview of this book

FreeSWITCH is one of the best tools around if you’re looking for a modern method of managing communication protocols through a range of different media. From real-time browser communication with the WebRTC API to implementing VoIP (voice over internet protocol), with FreeSWITCH you’re in full control of your projects. This book shows you how to unlock its full potential – more than just a tutorial, it’s packed with plenty of tips and tricks to make it work for you. Written by members of the team who actually helped build FreeSWITCH, it will guide you through some of the newest features of version 1.6 including video transcoding and conferencing. Find out how FreeSWITCH interacts with other tools and APIs, learn how to tackle common (and not so common) challenges ranging from high availability to IVR development and programming advanced PBXs. Great communication functionality begins with FreeSWITCH – find out how and get your project up and running today.
Table of Contents (21 chapters)
Mastering FreeSWITCH
Credits
About the Authors
About the Reviewers
Contributors
www.PacktPub.com
Preface
7
WebRTC and Mod_Verto
Index

Encrypting SIP with TLS (SIPS)


TLS, as SSL, depends on certificates issued by a Certification Authority that guarantee the identity of the certificate bearer. You can buy a TLS certificate from the same CAs that sell Web HTTPS certificates. You can then use that same certificate with WebSockets, WebRTC and mod_verto too (and for the HTTPS website with the same name as your SIP registrar, for example, https://pbx.freeswitch.org).

Also, you can use free and valid certificates from https://letsencrypt.org/, (see the automatic script in FreeSWITCH Confluence about verto_communicator demo installation on Debian 8).

The tool you use to generate the various certificates involved is (aptly named) gentls_cert:

/usr/local/freeswitch/bin/gentls_cert command -cn pbx.freeswitch.org -alt DNS:pbx.freeswitch.org -org freeswitch.org

(Instead of pbx.freeswitch.org and freeswitch.org, use the FQDN your clients will use as SIP registrar and SIP domain).You will use the same utility with the same arguments, but...