participants are not able to join the session.

Hello,
When the installation is complete, if I open the Jitsi site URL “http://dell.crna.dz” in a browser, it is fully functional but I could not test it to create meetings.
ie for guest of other people, when I share the link of the meeting, it does not work and when I see the properties of the host, it displays address: N / A.
other participants are not able to join the session.
is that the problem lies in the configuration of videobridge.
if so is this syntax correct, namely:
public ip address: 41.110.65.158
local ip address: 192.168.1.50
org.ice4j.ice.harvest.NAT_HARVESTER_LOCAL_ADDRESS = 192.168.1.50
org.ice4j.ice.harvest.NAT_HARVESTER_PUBLIC_ADDRESS = 41.110.65.158

This server is not responding and has not a valid DNS A record