Date: Mon, 10 Jan 2005 10:53:39 -0600 From: Len Conrad <LConrad@Go2France.com> To: freebsd-net@freebsd.org, freebsd-questions@freebsd.org Subject: buildup of Windows time_wait talking to fbsd 4.10 Message-ID: <6.1.1.1.2.20050110103857.045a9a68@81.255.84.73>
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We have a windows mailserver that relays its outbound to a fbsd
gateway. We changed to a different fbsd gateway running 4.10. Windows then
began having trouble sending to 4.10. Windows "netstat -an" shows dozens
of lines like this:
source IP desitination IP
======================================================================
TCP 10.1.16.3:1403 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1407 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1415 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1419 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1435 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1462 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1470 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1473 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1478 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1493 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1504 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1507 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1508 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1521 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1526 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1546 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1550 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1568 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1571 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1589 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1592 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1616 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1620 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1629 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1644 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1647 192.168.200.59:25 TIME_WAIT
TCP 10.1.16.3:1654 192.168.200.59:25 TIME_WAIT
Eventually, the windows SMTP logs line like "cannot connect to remote IP"
or "address already in use" because no local tcp/ip sockets are available,
we think.
The new gateway/fbsd 4.10 "sockstat -4" shows no corresponding tcp
connections when the Windows server is showing as above. On the fbsd 4.10
machines, smtp logs, syslog, and dmesg show no errors.
We switch the windows box to smtp gateway towards the old box/fbsd 4.7, all
is cool.
Suggestions with how to proceed debugging, please.
I'm trying to get the dmesg.boot for the 4.7 and 4.10 boxes now, sorry.
Len
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