> 
> Exist some project so that the IPF starts to filter in BRIDGE ?

Not on NetBSD.  From the 'bridge' man page:

BUGS
     The bridge driver currently supports only Ethernet and Ethernet-like
     (e.g. 802.11) network devices, with exactly the same interface MTU size
     as the bridge device.

     The bridge driver currently does not support snooping via bpf(4) or
     transparent filtering.

David S.


>