The Free SIP service web pages are currently not working:
Doing this from apps still works as expected. The SIP service itself (for already registered users) is not affected.
We apologize for all the inconvenience and do our best to recover by exploring different options.
For those who are interested in technical details, we are facing an issue that numerous web sites or services are facing since May 30th, let 's call it the "AddTrust root certificate expiry issue".
It is a somewhat complex TLS certificate validation problem triggered by the recent expiration on May 30th of a root certificate. Some of you running old or not so old (such as Centos 7) versions of GNU/Linux (actually with openSSL 1.0.x) may even not be able to connect to linphone.org
For those who are interested in the details, this web page
explains the technical details of this problem.