[Help] Server unreachable above 800 clients

Hello, I am using the latest version of TS3 Server and I have tested it on multiple host/OS but in the end I’m still getting the same issue.

It seems that above 700-800 clients the server becomes for some reason unreachable. Connected clients and few people can’t still connect but most people even those who wants to reconnect gets “Failed to connect to server”.

Is there any useful information I could gather? Or maybe it is something I forgot to toggle? :man_shrugging:
Thank you

any logs?
the server is overloaded?
client limit is reached?

The host is fine.
Client limit is 1024 and ‘only’ 800 clients are there.
Client logs:
6/9/2020 22:10:25 ClientUI Info Connect to server: ts.gtaliferp.fr
6/9/2020 22:10:25 ClientUI Info Trying to resolve ts.gtaliferp.fr
6/9/2020 22:10:25 TSDNS Info A/AAAA DNS resolve successful, “ts.gtaliferp.fr” =(h: 51.210.100.253 p:0)
6/9/2020 22:10:25 TSDNS Info A/AAAA DNS resolve for possible TSDNS successful, “ts.gtaliferp.fr” =(h: 51.210.100.253 p:0)
6/9/2020 22:10:25 TSDNS Info A/AAAA DNS resolve for possible TSDNS successful, “gtaliferp.fr” =(h: 2606:4700:3035::ac43:9441 p:0), (h: 172.67.148.65 p:0)
6/9/2020 22:10:25 TSDNS Info SRV DNS resolve unsuccessful, “_tsdns._tcp.gtaliferp.fr” Domain name not found
6/9/2020 22:10:25 TSDNS Info SRV DNS resolve unsuccessful, “_ts3._udp.ts.gtaliferp.fr” Domain name not found
6/9/2020 22:10:27 TSDNS Info TSDNS queried unsuccessfully 51.210.100.253:41144
6/9/2020 22:10:27 TSDNS Info No TSDNS found
6/9/2020 22:10:27 TSDNS Info TSDNS queried unsuccessfully 2606:4700:3035::ac43:9441:41144
6/9/2020 22:10:29 TSDNS Info TSDNS queried unsuccessfully 172.67.148.65:41144
6/9/2020 22:10:29 TSDNS Info No TSDNS found
6/9/2020 22:10:29 ClientUI Info Lookup finished: ip=51.210.100.253 port=9987 query=ts.gtaliferp.fr error=0
6/9/2020 22:10:29 ClientUI Info Resolve successful: 51.210.100.253:9987
6/9/2020 22:10:29 ClientUI Info Initiating connection: 51.210.100.253:9987
6/9/2020 22:10:29 ClientUI Info Connect status: Connecting
6/9/2020 22:10:30 PktHandler Devel Puzzle solve time: 5
6/9/2020 22:10:36 PktHandler Info Cleaning up connection because of 5 resends of COMMAND packet
6/9/2020 22:10:36 ClientUI Info Connect status: Disconnected
6/9/2020 22:10:36 ClientUI Info Failed to connect to server, want autoreconnect = 0