Ian! D. Allen wrote:
Is the same track I went along a week or so ago and seems to work fine.I suspect the fix is somehow to mark the port forwarded packets with a flag indicating on which interface they arrived at the Linux router, and then preserve this flag into the answer packets on the web server. On the Linux router I can then make sure that appropriately flagged answer packets go out the correct interface. Am I on the right track here?
Mark them as they come in, then make the PREROUTING table direct them to the appropriate routing table to get back out.
regards
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