Under DNS setting, should I click "Scavenge stale resource records" ?
What's the no-refresh interval and refresh interval ? What is their value if their DHCP is set to 9 hours ? Will that DHCP value be too much ?
Under DHCP setting, which value is recommended, "Dynamically update DNS A and PTR records only if requested by the DHCP clients", or "Always dynamically update DNS A and PTR records".