Speaking of ship blockers for 9....

Garrett Cooper
>     Is this is in 9.1 -PRERELEASE, -RELEASE (or whatever the official
> label is...)? If so, it seems like this would be a ship blocker.

I have a problem that's been getting progressively worse as the
source progresses.  So much so that it's had me searching all the
way from 8.0-RELEASE to 10-CURRENT without luck on both amd64 and
i386.

pf(4) erroneously mismatches state and then blocks an active flow.
It seems that 8.X does so silently and 9 to -CURRENT do so verbosely.
Whether silent or loud, the effect on traffic makes it impracticle
to use FreeBSD+PF for a firewall in any setting (my use is home,
small office, large office and moderately large datacenter core
router).  It appears that this has actually been a forever problem
that just being tickled more now.

Here's from my home firewall:
Status: Enabled for 7 days 02:57:58           Debug: Urgent

State Table                          Total             Rate
  current entries                     1653               
  searches                        45792251           74.4/s
  inserts                           428375            0.7/s
  removals                          426722            0.7/s
...
  state-mismatch                      1586            0.0/s


Here's from a moderately busy firewall:
Status: Enabled for 0 days 21:40:44           Debug: Urgent

State Table                          Total             Rate
  current entries                   122395               
  searches                      4428641685        56745.4/s
  inserts                        202644593         2596.5/s
  removals                       202522198         2595.0/s
...
  state-mismatch                    277767            3.6/s

That's 277767 flows terminated in the last almost 22 hours due to
this pf bug. (!!!)

9.1-PRERELEASE logs (as does -CURRENT):
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:60985, a1: 192.41.162.30:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:52995, a1: 41.154.2.100:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:60095, a1: 206.223.136.200:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:50463, a1: 206.223.136.200:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:56748, a1: 192.41.162.30:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.
Jul 22 08:54:25 brane kernel: pf: state key linking mismatch! dir=OUT, if=tun0, stored af=2, a0: 10.0.2.220:60793, a1: 192.41.162.30:53, proto=17, found af=2, a0: 41.154.2.53:1701, a1: 41.133.165.161:59051, proto=17.

Ian

-- 
Ian Freislich