STEP 1. Log in to your Terminal

STEP 2.
Click DNS Management > Reverse DNS Records and select bulk upload tab. Then select what type of IP addresses you wish to upload (IPv4 or IPv6).

STEP 3. Open any text editor like Notepad++, Notepad or any other preferable and fill in records in the following format:
address,content,ttl

Save rDNS records list as CSV file. See image below for example:

STEP 4. Use Terminal ->  DNS Management -> Reverse DNS records -> Bulk tool -> Choose File button to select saved rDNS file from your computer to set new PTR records.

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