I have a WR44 on a statically addresses PPPoE connection. This router is connected to by 3 other WR44 units over IPsec and a single Linux host that is using GRE tunnels inside IPSec tunnels.
The problem is the Linux host cannot ping any of the IPSec connected WR44 units, it can only ping and communicate with the DSL connected outer and the network's behind it.
This is very odd.
I have anohter side with a WR44 host as the IPSec responder and the WR21 in the field connected to the WR44 over IPsec. The bahavior is the same. Connecting a linux host to the WR44 using GRE inside IPSec tunnels cannot ping the otehr WR IPSec connected units.
Why are the eroutes not forwarding the packets to the other networks?