Access websites from servers on the same DMZ net

I have problems to access our websites located on DMZ from DMZ, from the outside it works fine.

We have 5 public IP on the WAN interface, 4 of them are NATed to internal servers.

We have 4 servers on 192.168.2.0/24 net, these have websites on them an for test purpose we need to access the websites from the same network.

I got good information before here about Hairpin NAT and LAN to DMZ access.

"Hairpin is only required when traffic enters and leaves the same interface"

So I turned on hairpin NAT for DMZ interface but there was no differance.