Jan Engelhardt wrote:
On Friday 2010-07-02 12:17, Patrick McHardy wrote:
I still have not grasped why SNAT is needed in the INPUT path. For the
tunnel scenario that you wanted to build I could not find a reason to
do SNAT in that place - since the non-encapsulated packets don't go
through INPUT anyway.
Sure they do, if they are destined for the host itself. I'm not sure
what's so hard to understand about this patch, you have f.i. multiple
tunnels using the same remote network, on INPUT and POSTROUTING you SNAT
them to seperate networks based on criteria like the network device or
the IPsec tunnel to be able to distinguish them.
But they are already distinguishable by the ctmark that is applied
to these connections to do routing of the reply, are they not?
Its not (only) about routing, you simply can't have two connections using
the same identity.
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