* use fr_tcpstate() with NAT code for increased NAT usage security or even
  fr_checkstate() - suspect this is not possible.

* see if the Solaris2 and dynamic plumb/unplumb problem is solvable
done ?

time permitting:

* load balancing across interfaces

* record buffering for TCP/UDP

* modular application proxying
on the way

* keep fragment information for state entries automatically.
done for NAT

* support traceroute through the firewall
  (i.e. fix up ICMP errors coming back for NAT)
done

* allow multiple ip addresses in a source route list for ipsend

* complete Linux port to implement all the IP Filter features