Turning off IPv6 support

[Tulkas59]

Description

I would like to turn off IPv6 support.

• Prosody. Done. I just read the documentation (https://prosody.im/doc/ports).
• Meet. Done. I set useIPv6 = false (even if this parameter seems to be deprecated) and configured apache appropriately.
• Jicofo. Done. Setting -Djava.net.preferIPv4Stack=true seems to do the trick.
• Videobridge. I set -Djava.net.preferIPv4Stack=true and org.ice4j.ipv6.DISABLED=true but JVB is still listening on UDP6 port 5000.

All of this was already discussed in the community forum (https://community.jitsi.org/t/how-to-configure-the-whole-jitsi-stack-to-use-ipv4-only/30303/6) but I failed to get an answer. I am now guessing it is actually an issue.

Note that I still do not know the role of this port. I did not open it and all is working fine.

Current behavior

Setting org.ice4j.ipv6.DISABLED=true does not turn off IPv6 completely. JVB is still listening on UDP6 port 5000.

Expected Behavior

JVB does not listen on any TCP6 or UDP6 port.

Environment details

Jitsi-meet stable package (auto install) on debian buster.

All the best,

[bgrozev]

See this docs: https://github.com/jitsi/jitsi-videobridge/blob/master/doc/tcp.md#configuration-of-ice4j

Contributions to make this more visible are welcome