Broken IPsec + enc +pf/ipfw

[Matthew Grooms]

On 10/21/2014 11:06 AM, Kyle Williams wrote:
> Hello,
>
> I'm currently using 10.0, IPSEC, racoon, enc, and pf between two remote
> hosts without NATT. The gif tunnel is ipv4 only, host A is ipv4 only,
> host B is ipv4/ipv6. I use IPSEC to route traffic between jails on both
> hosts, with the jails using cloned lo1 and 10.0.0.0/8 addresses.
>
> I'm testing the posted patches on host A with the following pf.conf:
>    block all
>    pass all
>
> I'm using the recommended sysctl's:
>    net.enc.in.ipsec_bpf_mask=2
>    net.enc.in.ipsec_filter_mask=2
>    net.enc.out.ipsec_bpf_mask=1
>    net.enc.out.ipsec_filter_mask=1
>
[...]
>
> I'm willing to test more kernel patches, but I can't install head.
>

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.

Thanks,

-Matthew