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OSPF between checkpoint R70 and Cisco 3750

I'm using a cisco 3750 L3 switch each side of a checkpoint firewall running the latest code R70. They have established an OSPF adjacency fine and I'm seeing a couple of issues.

1) The FW seems to learn the default route ok from the external 3750 but it doesn't use it! We proved this by adding a static route in (exactly the same in the routing table) and it worked! Take the static out and there is the OSPF default route not being used.

2) The FW does not seem to pass all of it routes on to the external 3750, so the 3750 only has a few OSPF routes in.

The OSPF config is not advanced, just a fairly simple config like this (this is not the actual config just what I can remember from memory)

log adjacency changes

area 0 authentication md5

network <network><mask> area 0

passive-interface default

no passive-interface <interface>

It's the same on the R70.

Has anyone else seen these issues with R70? Also anyone noticed any issues with NAT on the R70 code?