I have three Windows Server 2008 R2 VMs running on VirtualBox on an internal network 192.168.42.0/24. IP addresses are 192.168.42.1, 192.168.42.2, and 192.168.42.3.
All three hosts could ping each other originally.
I made .1 a domain controller and added .2 and .3 to the domain.
Since then .1 can ping all three servers while .2 and .3 can both ping .1 and themselves but not each other.
The firewall service is stopped and set to manual on all three servers.
What did I overlook?