NAT LAN address from one subnet to another LAN Subnet

[Snailkhan]

hi
i have three 4 subnets one wired lan .
other three are wireless ssids.
subnets are 192.168.4.0/24 of lan subnet and 192.168.12.0/24 for wifi subnet.
i have a device on wifi subnet that i cannot access from a pc connected to the lan subnet.. cant ping it. cant telnet into the open ports when i am on lan subnet.

however from pfsense can see it ping it and see the service port open.
also accessible form wifi subnet.

i found that that device doesnt have default gateway option in its ip settings and can only be acessible from same subnet.

i want pfsense to NAT based a lan subnet ip like 192.168.4.123 to another ip on 192.168.12.123 instead of doing straigh forward routing between them.

is it possible to do so ?
the wifi subnet and lan subnet both resid on this pfsense box.

regards

[viragomann]

If the device just should be reachable from other subnets, not revers, do source NAT for it.

Add an outbound NAT rule to the interface the device is connected to, source = any, destination = the address of that device, translation = interface address.
The outbound NAT must be set to hybrid or manual rule generation.

[johnpoz]

what device is it that does not allow you to set a gateway?  Doing a source nat is a work around, not the correct solution to the problem.  Your device is not meant to be used outside of its own layer 2 network for what reason?  What is the device?  Some wifi router your trying to use as AP?  If it supports putting 3rd party firmware on it like openwrt or dd-wrt, etc. this would allow you to set a gateway.