How to import your DNS in vesta cp?

Question

Domain Name System

The essence of the problem is that - it is necessary that the vps distributed from vesta have the dns of my site.
Now, by default, the name servers in Vesta are ns1.localhost.ltd
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hoster does not recommend using dns from Vesta, and in fact, some dns records do not work correctly, for example, cname, dkim,
who has configured Vesta in this area? share your experience?
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Question 2, are there free ftp plugins for vesta, by default only paid ones