Suddenly ns1 and ns2 resolves to nothing...

Hello Experts,
I am a newbie here and seeking help with my nameserver resolving.

I have settled CWP based test server on AWS and yesterday everything was working as expected. But, when I woke up today and checked my website it was not working.

While investigating reasons what I found that BIND DNS Server is failed and ns1 and ns2 resolves to nothing.

Can someone please help ?

I was thinking to use CWP Pro, but these things are stopping me to do so...

You say you're a rookie and yet you say these things prevent you from using the "pro" version. Maybe you should think you don't have enough knowledge and choose to pay the CWP guys a support plan.

https://control-webpanel.com/support-services

Greetings!

1)  Find out why bind/named failed. Check the error logs /var/log
2)  Your NS servers should ALWAY have an IP if setup correctly. You should register your nameservers/host records with your domain registar.
3)  Even if 2 is true and you bind has failed on both servers nothing will resolve.  But if even 1 is running you should be able to resolve dns, albeit a few failures.  So keep the serves up