[Bug 207598] pf adds icmp unreach on gre/ipsec somehow

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207598

--- Comment #18 from Max <maximos at als.nnov.ru> ---
no scrub on gre1 proto icmp
scrub on gre1
There is no "host unreachable".

14:58:34.741461 rule 0..16777216/0(match): pass in on em0: 192.168.10.1 >
192.168.10.254: GREv0, proto IPv4 (0x0800), length 1480: 10.10.1.1 > 10.10.3.1:
ICMP echo request, id 59142, seq 0, length 1456
14:58:34.741471 rule 0..16777216/0(match): pass in on gre0: 10.10.1.1 >
10.10.3.1: ICMP echo request, id 59142, seq 0, length 1456
14:58:34.741479 rule 0..16777216/0(match): pass out on gre1: 10.10.1.1 >
10.10.3.1: ICMP echo request, id 59142, seq 0, length 1456
14:58:34.741486 rule 0..16777216/0(match): pass out on em2: 192.168.30.254 >
192.168.30.1: GREv0, proto IPv4 (0x0800), length 1480: 10.10.1.1 > 10.10.3.1:
ICMP echo request, id 59142, seq 0, length 1456
14:58:34.741542 rule 0..16777216/0(match): pass in on em0: 192.168.10.1 >
192.168.10.254: GREv0, proto IPv4 (0x0800), length 26: 10.10.1.1 > 10.10.3.1:
ip-proto-1
14:58:34.741571 rule 0..16777216/0(match): pass in on gre0: 10.10.1.1 >
10.10.3.1: ip-proto-1
14:58:34.741576 rule 0..16777216/0(match): pass out on gre1: 10.10.1.1 >
10.10.3.1: ip-proto-1
14:58:34.741580 rule 0..16777216/0(match): pass out on em2: 192.168.30.254 >
192.168.30.1: GREv0, proto IPv4 (0x0800), length 26: 10.10.1.1 > 10.10.3.1:
ip-proto-1
14:58:34.741648 rule 0..16777216/0(match): pass in on em2: 192.168.30.1 >
192.168.30.254: GREv0, proto IPv4 (0x0800), length 1480: 10.10.3.1 > 10.10.1.1:
ICMP echo reply, id 59142, seq 0, length 1456
14:58:34.741654 rule 0..16777216/0(match): pass in on gre1: 10.10.3.1 >
10.10.1.1: ICMP echo reply, id 59142, seq 0, length 1456
14:58:34.741659 rule 0..16777216/0(match): pass out on gre0: 10.10.3.1 >
10.10.1.1: ICMP echo reply, id 59142, seq 0, length 1456
14:58:34.741665 rule 0..16777216/0(match): pass out on em0: 192.168.10.254 >
192.168.10.1: GREv0, proto IPv4 (0x0800), length 1480: 10.10.3.1 > 10.10.1.1:
ICMP echo reply, id 59142, seq 0, length 1456
14:58:34.741682 rule 0..16777216/0(match): pass in on em2: 192.168.30.1 >
192.168.30.254: GREv0, proto IPv4 (0x0800), length 26: 10.10.3.1 > 10.10.1.1:
ip-proto-1
14:58:34.741686 rule 0..16777216/0(match): pass in on gre1: 10.10.3.1 >
10.10.1.1: ip-proto-1
14:58:34.741691 rule 0..16777216/0(match): pass out on gre0: 10.10.3.1 >
10.10.1.1: ip-proto-1
14:58:34.741696 rule 0..16777216/0(match): pass out on em0: 192.168.10.254 >
192.168.10.1: GREv0, proto IPv4 (0x0800), length 26: 10.10.3.1 > 10.10.1.1:
ip-proto-1

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