Bug 212143 - ipfw fwd does not work if defaultgateway is tun while reconnecting
Summary: ipfw fwd does not work if defaultgateway is tun while reconnecting
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: 10.3-RELEASE
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-ipfw (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-08-25 13:16 UTC by doorsfan
Modified: 2025-02-21 13:20 UTC (History)
1 user (show)

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Description doorsfan 2016-08-25 13:16:42 UTC 
2 gateways:

1. rl0=1.2.3.2/30, 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 
ping -S 1.2.3.2 8.8.8.8
and 
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 
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
Comment 1 doorsfan 2016-08-25 13:21:14 UTC 
ping -S 1.2.3.2 8.8.8.8
and 
ping -S 5.6.7.8 8.8.8.8
of course
"Works ok" mean both fwd rules forward packets
Comment 2 Mark Linimon freebsd_committer freebsd_triage 2025-02-21 13:20:36 UTC 
^Triage: to submitter: does this problem still recur on recent versions of FreeBSD?