Hubless network?

[Peter Billson <pete@elbnet.com>]

  I am trying to avoid using a hub (hub goes *poof* neither machine can
talk to the Net) to connect 2 internal machines to the net through a
Linux box configured as a router. The box has three NIC cards as
follows:

eth0 - 192.168.1.6 connection to my Internet gateway (192.168.1.1)
eth1 - 192.168.2.1 connection to box 1 (192.168.2.2)
eth2 - 192.168.2.4 connection to box 2 (192.168.2.3)

My route is set up as follows:

Destination	Gateway 	Genmask 	Iface
192.168.2.3	192.168.2.4	255.255.255.255	eth2
192.168.2.2	192.168.2.1	255.255.255.255	eth1
192.168.1.0	0.0.0.0		255.255.255.0	eth0
0.0.0.0		192.168.1.1	0.0.0.0		eth0

My problem is the box 1 can't talk to box 2. Either can talk to the
router, to the outside world, to the 192.168.1.1 gateway, etc. They both
can even talk to both eth1 and eth2, just not the other box. What am I
missing?