Question Plesk DNS Security

[yoelrodguez]

Server operating system version

debian 9

Plesk version and microupdate number

18.0.44

Hello, I have the following situation. I am using plesk's own dns with the default nameservers of my domain but when I do some dns security tests it returns (mydomain.com has address 88.88.88.88). As I see on the internet, this type of vulnerability can be used as a DDoS attack. My question is the following: How can I solve this problem to increase the security of my dns?

Thank you

 

[GwenDragon]

Upgrade your OS frist, Debian 9 has End o Life seince Juen 2022 and does not get security and other updates.

 

[Kaspar]

What exactly is the vulnerability in this scenario?

 

[yoelrodguez]

Thanks for answering, as I saw on the internet when you run this command (host mydomain.com 88.88.88.88 response mydomain.com has address 88.88.88.88) my server is vulnerable to: amplification attacks.