I'm seeing some slowness with ipnat.

here is my set up: Q800, 24ram , 1.3.2.

[28.8 modem]
        |
        |
[netbsd/ipnat]
        |
        |
        |
[ 8port hub ]
  |  |  |  |  |  |  |
  |  |  |  |  |_____[mac]
  |  |  |  |_____[pc]
  |  |  |_____[another mac]
  |  |_____[NeXT]

When i go to the internet from anywhere behind the IPNat box I get about
half of the speed I would expect. ~ 14.4 - 16.0 baud.  however an ftp
download will yeild 26.0 -- 28.8 baud from the netbsd/ipnat box.

I remember seeing something on the list a while back but I must not be
searching for the right thing in the archives.

Any Ideas?