OpenWRT routing

[Bruce Dawson]

I've recently loaded a Linksys box with OpenWRT (version WhiteRussian).
And I've been able to get everything working.

However, when I try to set up a ppp connection between the local Linksys
box (running OpenWRT) and a remote box, I can ping the remote box from
the local box, but I can't ping the remote box from the network inside
the local box.

The routing table as reported by OpenWRT's route command is:

root at DiamondRubyLNF:/etc/init.d# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
192.168.56.126  *               255.255.255.255 UH    0      0        0 ppp0
172.31.1.0      *               255.255.255.0   U     0      0        0
vlan1
192.168.56.0    192.168.56.125  255.255.255.0   UG    0      0        0 ppp0
192.168.74.0    *               255.255.255.0   U     0      0        0 br0
default         172.31.1.1      0.0.0.0         UG    0      0        0
vlan1
default         192.168.74.1    0.0.0.0         UG    0      0        0 br0
root at DiamondRubyLNF:/etc/init.d# ping 192.168.56.3
PING 192.168.56.3 (192.168.56.3): 56 data bytes
64 bytes from 192.168.56.3: icmp_seq=0 ttl=63 time=145.3 ms
...

The "local network" (inside the local box) is 192.168.74.0/24. The
"remote network" (inside the remote box) is 192.168.56.0/24.

Again, I can ping between the two routers, and ping from the local
router into the remote network, but I can't ping from the local network
into the remote network.

Does anyone have any ideas what I need to do to accomplish this?