has anyone got this to work with pfSense and HAproxy?

[planetinse]

I'am trying to use either a map file or a direct dynamic backend connection with HA and pfSense.

ie.

use_backend %[req.hdr(host),lower,map_dom(/etc/haproxy/maps/hosts.map,be_default)]

or

use_backend %[req.hdr(Host),lower]

i have tried but this as custom action or as passthru - but i cant get anything working, and nothing useful in logs either.

it always results in a 503 - even if i add a default backend.

ideas?