Configuring IP addresses and subnets

[Stef_R]

This might be a silly question, but am having a hard time configuring my setup.
Basically, I have a Netgate Firewall which acts also as a DHCP Server.
I have my main interface LAN on Ethernet port eth0. I have created a "Management VLAN" and three "WiFi VLAN's".
My main LAN is configured with an IP address 192.168.0.1 /24
My Management VLAN has ID#24 and is setup with IP address 192.168.24.1 /24
WiFi VLANS have been setup similar with VLAN ID's: 34,36 and 38.
(IP addresses 192.168.xx.1 /24 where xx stands for the VLAN ID.)

The firewall is connected to a 28port Cisco switch with DHCP Relay enabled.
Configuration has been setup as a Layer3 switch.
I also have a Cisco 2504 WLC controller with 5 access points.

where I'm struggling is, what IP addresses I should give to the physical interface eth0 of the pfSense firewall, and what IP address I should assign to the vlan 1 of the Cisco SG300 switch?

It looks like I get my assigned IP addresses from the pfSense firewall DHCP Server, because when I connect a console cable to the switch or the WLC, I can see the IP addresses that have been assigned.

But for some reason, I can't access the pfSense firewall through the switch, so obviously I must have done something wrong.
But I think I'm staring blind here because I can't seem to figure out what I have done wrong...

I hope someone can point me to the correct way to get this working :-)