firewals package - NFS exports

I got that firewals packet filter thing going - which was a lot easier than delving straight into ipchains! What I'd like to know is which settings to use when I want to allow NFS exporting to the local trusted network (the FW_SERVICES_INTERNAL variables). The ports involved seem to be a little on the move?? Sorry of this was up before, but can someone point me to some reasonable settings which work in practice? Thanks, Volker