SolusVM gives you an option to add a reverse DNS zone and assign to a specified IP block.

  1. From the admincp go to Configuration > PowerDNS

2. Click the View details icon for the DNS server you want to use. Click the Add Reverse DNS Zone button at the bottom of the next screen.

3. Fill in all the fields on the next screen:

4. Under the IP block settings, set the PowerDNS Server and the Zone ID: