server admin networking dns problem

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server admin networking dns problem
my server admin copied a server so we could apply to a different subdomain and use for development of an my website cms program. Since this, somehow the DNS is messed up and I cannot login to the program.
I need an person experienced with cpanel and dns / networking issues to help us discover the problem so we can get my program working again
Skills:
DNS
, Linux
, System Admin
, Web Hosting
, Web Security

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