@Tescophil In your case yes, but not in my case! For my part the address is perfectly reachable (see my previous message: rtsp-dcipc.tplinknbu.com) but I have more than 11000 requests per day that is...

@Solla-topee It would be necessary to see with your technical team the possibility of integrating (with an update) a DNS cache in your cameras, I do not think that the IP of your servers evolve every...

For me the relays work, to check them load their addresses with a h ttps:// (it works with port 443). The basic problem remains, why this flood of DNS request !?! nmap...

Same problem for me... too many DNS requests without explanation. In my case the most questioned domain (more than 11000 requests per day) is : rtsp-dcipc.tplinknbu.com I made an nmap : Nmap scan...