Support for the enc(4) pseudo-interface

[Kristof Provost]

On 21 Mar 2017, at 12:44, Miroslav Lachman wrote:
> Kristof Provost wrote on 2017/03/21 10:18:
>> On 21 Mar 2017, at 9:43, Marin Bernard wrote:
>
>>> If there is no SA, it is impossible for a peer to ping another. As 
>>> soon
>>> as IKE creates a SA, however, ping starts working. As you can see,
>>> the last rule is explicitely bound to the inexistent enc0 interface, 
>>> and
>>> yet is working fine.
>>>
>> Can you try without the enc0 rule? I suspect that what’s happening 
>> here
>> is that
>> the IPSec traffic is bypassing the firewall altogether. If that's the
>> case the
>> your traffic will still flow, even without the pass on enc0 rule.
>>
>> If you want to filter on it it should work if you add ‘device 
>> enc’ to your
>> kernel config. The man page suggests that should then allow you to
>> filter IPSec
>> traffic on enc0.
>
> Shouldn't it be included in GENERIC if IPSec is now part of it? It 
> seems
> illogical to build own kernel for IPsec if IPSec was included in 
> GENERIC for
> 11.0 ... but without enc.
>
Yeah, perhaps it should be.

I’ve not used it myself, so I don’t know if/how well it works now, 
but unless
it breaks things or introduces significant performance regressions we 
should
probably turn it on too.

Martin, could you give us an idea of how well this works for you when 
you’ve
got the time to set it up?

Regards,
Kristof