Gateway connection to Chirpstack Azure (Semtech UDP)

Hi
I have installed Chirpstack in Azure.I am using the ip address of the server that was issued by Azure to connect the Dragina Lps8 gateway. But Chirpstack doesn’t see my gateway.
When I used Chirpstack locally, everything worked fine.
Please advise on effective ways to connect in these conditions.

Please see this guide, it contains steps to debug if data is received by the server:
https://www.chirpstack.io/docs/guides/connect-gateway.html

If the server does not receive the UDP data (see tcpdump commands in the guide), then it could mean there is a firewall issue.