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Date: Fri, 4 Nov 2011 04:02:47 +0000 (UTC)
From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
To: Kurt Jaeger <pi@opsec.eu>
In-Reply-To: <20111103155258.GA68080@home.opsec.eu>
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Cc: freebsd-stable@freebsd.org
Subject: Re: fbsd 8.2, L2TP over IPsec and pf ?
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On Thu, 3 Nov 2011, Kurt Jaeger wrote:

> Hello,
>
> I'm building a setup for incoming L2TP over IPsec connections
> using FreeBSD 8.2-REL.

I assume you are explicitly using tunnel mode?


> IPsec based on ports/security/ipsec-tools, the l2tp part
> works from net/mpd5/.
>
> If I disable the PF rules, everything works.
>
> If I enable the PF rules, the IPsec connection still comes up,
> but the L2TP requests are lost somewhere in the PF rules 8-(
>
> Interestingly, tcpdump enc0 does not see any encrypted packets (!)
> as long as the PF rules are active.

tried playing with the sysctls of enc(4)?
net.enc.in.ipsec_bpf_mask=0x00000003
net.enc.in.ipsec_filter_mask=0x00000003


> Any hints on the PF rules required to allow those packets in ?

need more details (if you want also off-list).

-- 
Bjoern A. Zeeb                                 You have to have visions!
          Stop bit received. Insert coin for new address family.