Jitsi
From Organic Design wiki
Installation
The Quick installation guide automatically installs the system into an existing web-server, so on a new machine it's a good idea to install Nginx first. It uses LetsEncrypt to create certs for SSL setup. Here's a list of the listening services that are running after the system is installed:
tcp 0 0.0.0.0:80 0.0.0.0:* LISTEN 505/nginx
tcp 0 0.0.0.0:5269 0.0.0.0:* LISTEN 450/lua5.2
tcp 0 0.0.0.0:8888 0.0.0.0:* LISTEN 399/java
tcp 0 0.0.0.0:4443 0.0.0.0:* LISTEN 454/java
tcp 0 0.0.0.0:443 0.0.0.0:* LISTEN 505/nginx
tcp 0 0.0.0.0:5280 0.0.0.0:* LISTEN 450/lua5.2
tcp 0 127.0.0.1:5347 0.0.0.0:* LISTEN 450/lua5.2
tcp 0 0.0.0.0:5222 0.0.0.0:* LISTEN 450/lua5.2
udp 0 0.0.0.0:55914 0.0.0.0:* 454/java
udp 0 0.0.0.0:58434 0.0.0.0:* 399/java
udp 0 0.0.0.0:10000 0.0.0.0:* 454/java