[Bug 226719] ipfw fwd skips the traffic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226719

            Bug ID: 226719
           Summary: ipfw fwd skips the traffic
           Product: Base System
           Version: 11.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: a at taldonov.ru

fwd 151.248.119.216,80 tcp from 10.0.12.117 to any dst-port 80 in via vlan101
pipe 4 tcp from any 80,443 to 10.0.0.0/20 out via vlan101
pipe 5 ip from 10.0.0.0/20 to any dst-port 80,443 in via vlan101

The rule of the firewall with pipe 5 is processed normally only without the fwd
rule, after adding the fwd rule, the speed is not limited to the pipe 5.

if you do not add a prohibiting rule before the rule 5 without the fwd rule,
the traffic does not go away, but after the recovery of the fwd rule, the
traffic passes at the maximum speed.

I have a similar problem on the server without nat too.

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