Let’s Encrypt is a free certificate authority launched in the second part of 2015, recently leaving the beta stage – from September 2015 to April 2016, they issued over 1.7 millions certificates.
Started by Mozilla and backed up by big IT players and organization (e.g., Internet Society, Cisco, HP, Microsoft, Facebook, …), it offers free TLS certificates that are trusted by all the major operating systems and browsers out there. In other words, you don’t have to pay for a TLS certificate, meaning that it is no reason to support HTTPS for your web server and SIP over TLS for your VoIP service.
Our Fred Posner made a blog article showing how simple is to deploy a Let’s Encrypt certificate for Kamailio – you can read it at:
Kamailio has one of the best and scalable TLS implementations, with asynchronous support since 2008, already deployed by large IM mobile services servicing millions of active users. If you don’t have TLS enabled in your Kamailio, it’s time to act, it costs nothing now and brings full privacy to your customers connecting over the public internet!
Of course, kamailio.org website is already using a Let’s Encrypt certificate.