6.2-STABLE: enc0 sees only outgoing packets in pf

[Andre Albsmeier]

On Sat, 24-Mar-2007 at 14:19:46 +0100, Volker wrote:
> Andre,
> 
> On 12/23/-58 20:59, Andre Albsmeier wrote:
> > [Retrying on -pf...]
> > 
> > (This is FreeBSD 6.2-STABLE as of yesterday using pf and FAST_IPSEC.)
> > 
> > Yesterday I started to play around with enc0 in pf. I hoped I
> > could now control IPSEC traffic in the standard way with pf rules
> > but it seems that only outgoing packets hit enc0. I added a
> > 
> > pass quick log on enc0 all
> 
> Do you really use that rule? If you're using a 'keep state' option

For playing around, yes.

> this would give the behavior you're experiencing.

That's why I didn't use 'keep state' :-).

> 
> > on top of all pf rules. When sending a single ping packet to
> > the remote side everything works but the only thing I see is
> > 
> > Mar 18 10:20:11 <local0.warn> gate pflogd: @0 pass out enc0 ICMP 192.168.164.81 -> 10.0.1.32 8 (echo)
> > 
> > (192.168.164.81 is my local gif0 address and 10.0.1.32 the remote).
> > 
> > However, when running a tcpdump on enc0 we see the answer as well:
> > 
> > listening on enc0, link-type ENC (OpenBSD encapsulated IP), capture size 1550 bytes
> > 10:20:11.475041 (authentic,confidential): SPI 0x50521518: IP A.B.C.D > E.F.G.H: IP 192.168.164.81 > 10.0.1.32: ICMP echo request, id 3631, seq 0, length 64 (ipip-proto-4)
> > 10:20:11.560430 (authentic,confidential): SPI 0x0cf2344e: IP E.F.G.H > A.B.C.D: IP 10.0.1.32 > 192.168.164.81: ICMP echo reply, id 3631, seq 0, length 64 (ipip-proto-4)
> > 
> > (A.B.C.D is my local gif0 tunnel endpoint and E.F.G.H the remote).
> > 
> > Just to make things clear: IPSEC works (as it did for years), I'm
> > just not able to control the incoming packets with enc0 in pf.
> 
> Not really what you're asking for but... I think you won't like to
> see _every_ packet in the firewall logs. Instead you really want to

Yes, for now I want to see every packet :-). Later, of course,
there will be one outgoing state-keeping rule and and another
incoming one to allow specific things additionally.

	-Andre

-- 
"Regression testing? What's that? If it compiles,
it is good, if it boots up, it is perfect."
                                     - Linus Torvalds