Caching Service and Client Usage

[southerndoc]

Currently I have my DNS servers pointed to 8.8.8.8 and 8.8.4.4 (DHCP server hands these out). My macOS server has caching service turned on. Do I need to have my DHCP server hand out the IP address of my macOS server (and then forward DNS lookups?) for clients to be able to use the caching service? Or will clients automatically detect the caching service on the network and use it regardless of which address the DNS entry is pointed to?

 

[960design]

Clients on the local network will automatically receive cache. Clients outside of local network, but inside of WAN can be picked up with modifications to caching peer / permissions.

 

[chrfr]

Currently I have my DNS servers pointed to 8.8.8.8 and 8.8.4.4 (DHCP server hands these out). My macOS server has caching service turned on. Do I need to have my DHCP server hand out the IP address of my macOS server (and then forward DNS lookups?) for clients to be able to use the caching service?

If everything is behind the same public IP address, then no, you don't need to do anything with DNS.
Apple has some details in their help for Server.app https://help.apple.com/serverapp/mac/5.2/#/apd74DDE89F-08D2-4E0A-A5CD-155E345EFB83