Allowing routing table visibility in jails to make multiple IPs work properly

[Rudy (bulk)]

I'm having issues when putting multiple IPs on a jail... one external, 
one internal (on a different vlan).  The source IP from the jail is 
always the first IP, so a solution is to use ipfw_nat to nat when using 
the internal vlan to the 'second ip'.  Ugly hack. and it doesn't work 
when there is an MTU difference between the vlans:


  http://www.freebsd.org/cgi/query-pr.cgi?pr=184389
  Re: kern/184389: libalias fails to adjust MTU from jails


The other solution is to  let the jail 'see' the routing table:
  devfs -m /data/example.monkeybrains.net/dev rule apply path kmem unhide
  devfs -m /data/example.monkeybrains.net/dev rule apply path mem unhide

Is there anyway (or plans for) a method to reveal the routing table but 
not all of mem and kmem to the jail?


Rudy