Domain in lan problem

[Guest]

hello, i have a problem with my domain in lan enviroment.
here is my setup:

LAN <–> SWITCH <--> PFSENSE <--> ISP MODEM <-->WAN
                  ^
                  |
                  |
            OPENBSD

The problem is that i cannot acces my openbsd box via my domainname from lan, from wan
everything works ok ( ive setup redirect to http, pop3/smtp etc to my openbsd server ).
Anybody can explain me how to setup pfsense box to redirect requests to my domainname
to my openbsd box with services from lan?

[hoba]

enable "nat reflection" at system>advanced in the webgui. This way all portforwarded services will be available by the public IP too. Alternatively you could set up a split DNS szenario that resolves the internal IP of the server for LAN clients.