30.14. Setting Up Partial Reverse Delegation
Partial reverse zone delegation is method for transferring the management of a small set of reverse IP addresses to another DNS server. Normally, reverse zones cover an entire class C network containing 256 addresses. However, many organizations have networks much smaller than this, containing maybe 16 or 32 addresses. Normally, this would make it impossible for the organization to manage its own reverse address mappings, as the addresses come from a network that is owned by an ISP or hosting company.
Fortunately, there is a solution. The ISP can set up Name Alias (CNAME) records in the reverse zone for the parent network that point to Reverse Address records in a special zone on the organization's ...
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