SPECIFICATION OF THE ENVIRONMENT:

Main server:
It is a VPS. Runs as a guest in a virtual environment.
Ubuntu 18.04.4 LTS (GNU/Linux 4.19.0-6-amd64 x86_64)

INSTALLED APPLICATIONS under the UBUNTU server:

Installation OpenMeetings 5.0.0-M4 on Ubuntu 18.04 LTS.pdf
Installation SSL certificates and Coturn for OpenMeetings 5.0.0-M4 on
Ubuntu 18.04.pdf
I used these two documents above and installed everything including
the CoTURN server and the "letsencrypt.org" free SSL certificate.
The SSL certificate was installed manually, I did nor used
the automatic installation method.
No firewall is activated on the Linux server.

INSTALLED APPLICATIONS/CLIENT MACHINES:
- operating systems: Windows 10
- Google Chrome is up to date
  (Version 81.0.4044.138 (Official Build) (64-bit))
- proxy: no

SPECIFICATION OF THE PERFORMED TESTING:
Two user are present in the same room.
One is sitting in Greece the other one in London.
We used the following functions:
- video/audio communication
- screenshare
Duration of the test: one hour

DESCRIPTION OF THE PROBLEM:

Audio/video connection suddenly stoped
abou ten times within the one hour.
The other user cannot hear/see me or the other way.
Connection can be reestablished with EXIT and
then entering the room again.

If I do same testing using two machines on the same
local network running the same client, the video/audio
communication is very stable.

DEBUG INFORMATION:
CoTURN server log:
288154: session 003000000000000117: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: handle_udp_packet: New UDP endpoint: local addr 89.120.30.78:3478,
remote addr 189.105.252.44:14294
288154: session 003000000000000118: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: handle_udp_packet: New UDP endpoint: local addr  89.120.30.78:3478
, remote addr 183.206.174.85:14295
288154: session 001000000000000118: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: handle_udp_packet: New UDP endpoint: local addr 95.140.40.95:3478,
remote addr  189.105.252.44:14294
288154: session 003000000000000119: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: session 003000000000000117: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: session 003000000000000118: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: session 001000000000000118: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized
288154: session 003000000000000119: realm <kurento.org> user <>: incoming
packet message processed, error 401: Unauthorized

Full of "error 401: Unauthorized" and video/audio unstable.
If I use the client machines on the local network, no "error 401:
Unauthorized" message
and  video/audio stable.

QUESTIONS:
1.
The turn server log has no date stamp so I cant determine the action in the
application.
Should I modify the COTURN server source and recompile it?

2.
Is "error 401: Unauthorized" a legal message?
Where can I find info about this?

3.
Has anyone the same problem?

4.
Should I set anything in the Chrome client
if I want to use it with the CoTurn server?

5.
I have several hours testing capacaty
every week.
Could you give me any hint how to proceed?
I want want to find out why is this version so
unstable. It is practically unusable.

By the way, I like OM.

Thank you.
jox

(REF: 2020-05-13-13-43-26)




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