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DNS reverse records and entries

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    I worked for a small company with Windows Server 2008 R2 AD and Linux mixed environment .
    My question is whether it is necessary to enter these DNS reverse entries in DNS reverse zone?

    some background:

    They had tons of DNS error and not FQDNs. I was told to enter each abandoned name or ip address in DNS reverse zone –add a new PTR.

    These are all internal not FQDN and Ip addresses. Even cannot ping these IP addresses. the name like winx86oxccc some kind of garbage.

    I think they are all abandoned names. Some VM users created a new VM and join the domain then these VMs are deleted… Thye have 500 VMs, some for developers ‘ testing.

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