From owner-freebsd-pf@FreeBSD.ORG  Tue Oct 11 18:57:16 2011
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From: =?WINDOWS-1251?B?wujy4Ovo6SDC6+Dk6Ozo8O7i6Pc=?= <artemrts@ukr.net>
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Date: Tue, 11 Oct 2011 21:41:00 +0300
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Subject: Filtering inside IPSec tunnel
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 I have the IPSec tunnel FreeBSD <-> CISCO. Tunnel works fine but I can filtering traffic inside tunnel with PF.

pf.conf

......

ipsec_if="gif0"

.......
block in all
block out all

### EXT_IF_OUT

pass out log quick on $ext_if inet from ($ext_if) to any modulate state

### EXT_IF_IN

pass in quick on $ext_if inet proto udp from $cisco to ($ext_if) port 500
pass in quick on $ext_if inet proto {esp ah ipencap} from $cisco to ($ext_if)

### IPSec VPN INTERFACE
#pass in quick on $ipsec_if inet from any to $ipsec_if
#pass out quick on $ipsec_if inet from $ipsec_if to any
block quick on $ipsec_if

But I still ping the second point of IPSec tunnel.
Where is my mistake?