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Date:      Thu, 25 Aug 2016 13:16:42 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 212143] ipfw fwd does not work if defaultgateway is tun while reconnecting
Message-ID:  <bug-212143-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212143

            Bug ID: 212143
           Summary: ipfw fwd does not work if defaultgateway is tun while
                    reconnecting
           Product: Base System
           Version: 10.3-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: yura_doorsfan@mail.ru

2 gateways:

1. rl0=3D1.2.3.2/30, gateway 1.2.3.1
2. rl1 PPPoE (/usr/sbin/ppp) tun0 5.6.7.8, gateway 9.10.11.12

2 rules:
fwd 9.10.11.12 ip from 5.6.7.8 to not 192.168.0.0/16 out
fwd 1.2.3.1 ip from 1.2.3.2 to not 192.168.0.0/16 out

/sbin/route add default 9.10.11.12
PPPoE!!!!!^^^

While pppoe works ok=20
ping -S 1.2.3.2 8.8.8.8
and=20
ping -S 1.2.3.2 8.8.8.8
works OK
If i plug off cable from RL1 (PPPoE) ppp begin to reconnect, ifconfig still
show me inet 5.6.7.8 --> 9.10.11.12  netmask 0xffffffff
netstat -rn  show me default route 9.10.11.12
and=20
ping -S 1.2.3.2 8.8.8.8
answer me:
ping: sendto: No buffer space available
and both fwd rules do not count packets (and tcpdump show me nothing)

This problem is partyaly fixed in 11.0rc1 and stable/11/ (08,21 2016) - "no
route to host" if default gateway is not assigned. I'll write another bug
report.
p.s. sorry for my english

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