help with ADFS lab

I am trying to set up a lab to wok with AD/ADFS3.0 lab in VMWare Fusion.
I need some help configuring the machine that I call ‘router’ -- how do I set up the DNS forwarding?

So far I have three ‘networks’:
1 for internet access/gateway
1 for test1.local
1 for test2.local

I want to set the lab up such that machines in test1 can ping machines in test2 by name, and visa-versa. The DNS in my gateway forwards requests for test1 to the test1 DNS; requests for test2 to the test2 DNS and requests for anything else to the parent DNS of the internet gateway (8.8.8.8).
Currently i have the following:
- machines in test1 can ping machines in test1 by Name (hostname or FQDN) or IP
- machines in test1 can ping machines in test2 by IP
- machines in test1 cannot ping machines in test2 by FQDN
- machines in test2 can ping machines in test2 by Name (hostname or FQDN) or IP
- machines in test2 can ping machines in test1 by IP
- machines in test2 cannot ping machines in test1 by FQDN
- machines in test1 or test2 can ping microsoft.com (or any other internet service) by name

I feel like I am very close to having this configured, I *just* need to configure ‘router’ to forward DNS requests to test1 and test2 correctly.


=============
Architecture:

---- GATEWAY ——
Primary gateway is a Windows 2012 R2 server:
 - Hostname: router
 - Domain: N/A - Workgroup
3NICS:
 - 192.168.1.180 (this connects to a LAN)
 - 10.10.100.254
 - 10.10.101.254
Windows Roles:
 - DNS
 - RAS

---- TEST1 NETWORK ----
Test1.local 10.10.100.0/24
Windows 2012 R2
 - test1-dc01.test1.local
 - 10.10.100.3 (SN:255.255.255.0; GW:10.10.100.254, DNS: 127.0.0.1)
 - DNS for test1.local
 - AD
Windows 8
 - test1-w8.test1.local
 - 10.10.100.64 (Subnet:255.255.255.0, GW: 10.10.100.254, DNS: 10.10.100.254)


---- TEST2 NETWORK ----
Test2.local 10.10.101.0/24
Windows 2012 R2
 - test2-dc01.test2.local
 - 10.10.101.3 (SN:255.255.255.0; GW:10.10.101.254, DNS: 127.0.0.1)
 - DNS for test2.local
 - AD
Windows 8
 - test2-w8.test2.local
 - 10.10.101.64 (Subnet:255.255.255.0, GW: 10.10.101.254, DNS: 10.10.101.254)