Broken IPsec + enc +pf/ipfw

[Andrey V. Elsukov]

On 22.10.2014 23:28, Matthew Grooms wrote:
> On 10/21/2014 1:39 PM, Kyle Williams wrote:
>> On Tue Oct 21 11:35:15 2014, Matthew Grooms wrote:
>>> Hey Kyle,
>>>
>>> Thanks for lending a hand. I tested a few myself last night but had no
>>> luck. This morning I received an email off list that pointed to a patch
>>> that was merged to 10 stable. It sounds promising ...
>>>
>>> Log:
>>>    Merge r263091: fix mbuf flags clash that lead to failure of operation
>>>    of IPSEC and packet filters.
>>>
>>> https://lists.freebsd.org/pipermail/svn-src-stable-10/2014-March/001111.html
>>>
>>>
>>> I won't have a chance to try it until after business hours tonight, but
>>> will report back to the list with my results. Alternately, I assume you
>>> also could upgrade to 10.1-RC2 as the MFC for this patch happened back
>>> in March. I may go this route myself and then bump up to RELEASE in a
>>> few weeks when it happens.
>>
>> r263091, r266800, and r272695 together on 10.0-RELENG works for me.
>>
>> I didn't test r263091 by itself.
>>
> 
> I couldn't get a kernel to boot without crashing with the single patch,
> (r263091) applied. With all three patches, I can also confirm that the
> problem is resolved.
> 
> And some additional info: I also experimented with using gif + IPsec
> transport mode instead of enc + IPsec tunnel mode. I was hoping that
> changing the configuration would work around the issue. Unfortunately,
> gif + IPsec transport mode was exhibiting the same type of problems that
> enc + IPsec tunnel mode was, even with a patched kernel ( pf doesn't see
> the traffic on the gif interface so return traffic gets blocked for lack
> of a state entry ).

Since you applied r266800, you now may apply r272394.

-- 
WBR, Andrey V. Elsukov