2 LAN and 1 WAN
We have 1 Internet connection (T1) and two companies. I wish to separate each company into its separate LAN. One firm already has Active Directory and DHCP on their network, and the other does not not - just workgroup. On the firm with only workgroup, I wish to use pfSense's DHCP to assign their IP addresses and leave the other firm's DHCP in place. How can I ensure than I separate the two LANS and ensure one firm uses pfSense's DHCP and the other LAN use it's own DHCP range.
LAN 1: Active Directory / own DHCP / 192.168.4.0/24
LAN 2: Workgroup based / use pfSense DHCP / 192.168.5.0/24
Just enable DHCP on the LAN2 interface and then create firewall rules on each interface that blocks traffic destined to the other segment.