Hi Denis, Apologies for the late reply.
To answer your question, and the steps which I followed are as follows, which are most similar to the steps which you shared in your email. As per instructions are given in the " https://doc-kurento.readthedocs.io/en/6.10.0/user/installation.html#installation-stun-turn" document, 1. I opened all the UDP ports in my security group. 2. Then I registered to the NUMB server to get the username and password. 3. To configure a TURN server in KMS, uncommented the following lines in the WebRtcEndpoint configuration file, located at /etc/kurento/modules/kurento/WebRtcEndpoint.conf.ini turnURL=<user>:<password>@<serverIp>:<serverPort> Following details are used in the server turnURL=<myusername>:<mypassword>@158.69.221.198:3478 4. And restarted the Kurento server. Thus my Mic and Audio issue resolved. On Thu, May 23, 2019 at 1:51 PM Denis Noctor <denisnoc...@gmail.com> wrote: > Hi there Tajuddin (and everyone else), > > Would you be kind enough to go through step by step the process you went > through to solve your problem. > > I have gone through all the installation processes of installing > everything on an AWS EC2 instance (with Ubuntu 18.04.2 LTS). At first > glance everything seemed to be working fine until I realized that when 2 > users were logged on in a room, they could see their own camera but could > not see the other participants screen (this applies to audio also). > > At first I thought this might be down to how I installed everything but > having read most (if not all the treads), I came across the following query > which suggests a Turn Server is required... ( > https://issues.apache.org/jira/browse/OPENMEETINGS-2066
 ) According > to the Kurento documentation ( > https://doc-kurento.readthedocs.io/en/6.10.0/user/installation.html ) > If Kurento Media Server, its Application Server, or any of the clients > are located behind a NAT > <https://doc-kurento.readthedocs.io/en/6.10.0/glossary.html#term-nat>, > you need to use a STUN > <https://doc-kurento.readthedocs.io/en/6.10.0/glossary.html#term-stun> or > a TURN > <https://doc-kurento.readthedocs.io/en/6.10.0/glossary.html#term-turn> server > in order to achieve NAT traversal > <https://doc-kurento.readthedocs.io/en/6.10.0/glossary.html#term-nat-traversal> > . I tried the suggest TURN settings using NUMB (after registering a user > name and password), but with no joy, still have the same problem. > > Finally on a separate matter I noticed there are 9 versions of Alvaro's > instructions for setting up openmeetings on Ubuntu 18.04 LTS - versions 1 > to 7 make reference to DOCKER.... 8 and 9 don't. Excuse my ignorance but > does that mean it is no longer require. All versions contain the same date > (25-3-2019). > > Any help would be appreciate. > > All the best. > > Denis > -- *Thanks & Regards,* *Tajuddin Bennur*