For a comparison of net speed on my workstation, I tested the standard PCLinuxOS setup with and without *bind*.
Using bind improved speed noticeably. Maybe, forum users with a workstation will wish to install it, and if so, in order to get dynamic addresses, they will have to make their first DNS server 127.0.0.1 and put the replaced first address as their second DNS server.
The Shorewall firewall will need to have DNS service allowed.
That should give you faster responses through your own DNS server on your workstation.