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Bug#859611: linux-image-4.9.0-0.bpo.2-amd64: ipsec gre tunnel not receiving packets

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On Tue, 2017-04-18 at 21:06 +1000, Russell Stuart wrote:
> I'll try it again with 4.9.18.

4.9.18 behaves identically.

However I loaded it on another machine, and it worked.  In fact it
worked with both 4.9.13 and 4.9.18.  These machines have very different
hardware, and are running running very different networking
configurations - but both are from the same image so only configuration
files are different.  Another way of saying the same thing is all non-
conf files installed by debian are identical.

Unfortunately while the software may be the same and the ipsec
configuration is almost identical (only my endpoint differs) the rest
of the networking configuration is very different. One is a AMD A10,
talking  to the internet over a single NIC using ADSL (pppoe).  The one
that doesn't work is a Dell dual Xeon, with a direct connection to the
internet over two bridged 10G NIC's with 3 different gateways.  I get
about 1 hour to a day to experiment with the machine that doesn't work,
and I don't have a clue where to start looking.

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Bug#859611: linux-image-4.9.0-0.bpo.2-amd64: ipsec gre tunnel not receiving packets Ben Hutchings <ben@decadent.org.uk> - 2017-04-07 21:50 +0200
  Bug#859611: linux-image-4.9.0-0.bpo.2-amd64: ipsec gre tunnel not receiving packets Russell Stuart <russell-debian@stuart.id.au> - 2017-04-18 13:30 +0200
    Bug#859611: linux-image-4.9.0-0.bpo.2-amd64: ipsec gre tunnel not receiving packets Russell Stuart <russell-debian@stuart.id.au> - 2017-04-19 14:00 +0200

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